Bright Idea #18: Make free calls on your mobile phone when you're in the office.
As a business owner, you're always looking for ways to reduce your costs—especially mobile phone bills. Most business contacts are easily reached on their mobiles and employees are storing more numbers on mobile phones—so naturally employees have a tendency to make their company calls from mobile phones. This leads to increasingly high mobile bills.
With SingTel's CallZone Broadband Solution you and your staff can now make free local mobile calls from your office, while enjoying a dedicated high-speed internet connection.
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Click here to hear from Frontship's Jack Chiang, on how SingTel CallZone lets him make free mobile calls in the office!
Here's a short video explaining how it works
- You'll need a high-speed Internet connection with SingNet Broadband.
- We set up a CallZone in your office by plugging a small device into the Broadband router.
- Anyone on the CallZone plan can make or receive free local calls with their SingTel mobile phone when in the zone.
- When you step outside the zone, while talking on your mobile the switch over is seamless and the calls are still free.
- In addition, your Internet speed won't be affected when someone makes mobile calls within the zone.
Enjoy unlimited FREE mobile calls all day with SingTel CallZone Broadband Solution.
It helps you to reduce office phone bills, while enabling internet access on ultra high speed broadband.
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SIGN UP FOR CallZone
To sign up for this product, please call us at : 1800-SME-1111 (1800-763-1111)
Or, pay us a visit at SingTel Shop @ Comcentre, Mon-Sat from 10am-9pm, Sun/PH from 11am-8pm.
CallZone Frequently Asked Questions
PRODUCT INFORMATION
- What is SingTel CallZone Service?
- Will I enjoy discounts for SMS, MMS and Broadband on Mobile with CallZone?
- Can I call non-SingTel subscribers with CallZone?
- Can SingTel prepaid customers benefit from the SingTel CallZone discounted rate?
- Will I enjoy additional discount on my IDD calls when I subscribe to SingTel CallZone?
- Will voice and video calls made within CallZone utilise my free airtime entitlement based on my mobile plan package?
- Can SingTel CallZone work on other mobile operators’ networks?
- I have subscribed to CallZone. If there is a voluntary TOS (Temporary out of Service), can I continue to enjoy the benefits after I recontract from TOS?
ELIGIBILITY
- I am registered under the Staff/Family Broadband Plan, can I subscribe to SingTel CallZone service?
- If I change my current mobile price plan to another price plan, can I still enjoy the same SingTel CallZone benefits?
- I have transferred my mobile line to my colleague. Will he/she still enjoy SingTel CallZone service?
- I have transferred my mobile line to another company. Can I still enjoy SingTel CallZone service in my former company?
- I have subscribed to SingTel CallZone. If I change my mobile number, will my CallZone subscription be brought forward to my new mobile number automatically?
- I have subscribed to SingTel CallZone. If there is a voluntary TOS (chargeable @ $5), can I continue to enjoy the benefits after I recontract from TOS?
- I have subscribed to free v019. Can my mobile number be included in the CallZone whitelist?
SERVICE CHARGES
- What are the charges applicable to SingTel CallZone Service?
- Is there any charge if I want to change my mobile numbers in the whitelist?
- Can I enjoy discounted calls when I make a call outside the CallZone coverage area and subsequently move into the zone in the midst of the call?
- Can I enjoy discounted calls when I make a call inside the CallZone coverage area and subsequently move out of the zone in the midst of the call?
- How will I see the CallZone savings on my bill?
- Can I see the breakdown of my CallZone savings on my bill?
- Do I get discounted calls if I add and remove my mobile number in the whitelist several times in 1 day?
- I have signed up for Frequently Called Number Service/BizTalk, can I still subscribe to CallZone? If yes, what would be the knock-off sequence of the discount?
SERVICE USAGE
- Do I need to manually set my mobile back to SingTel 3G network after I switch off the CallZone Device?
- Will my call drop if I move out of the CallZone coverage area?
- Will my call drop if I move from SingTel 3G network to the CallZone coverage area?
- How do I know if I am in the CallZone coverage zone?
- Can I take the CallZone Device overseas?
- Can I add new mobile numbers to my CallZone service after it is set up?
- How many simultaneous users can use the CallZone service?
- Can I use my normal phone functions like SMS, MMS and BroadBand on Mobile on the CallZone service?
- Can I make emergency calls in the SingTel CallZone coverage?
- Is the CallZone service dependent on my broadband speed?
EQUIPMENT AND INSTALLATION
- Is the CallZone service dependent on my broadband speed?
- What do I need to get started?
- How long do I need to wait for my CallZone Device to power up before my mobile phone can detect the service?
- Can I plug the CallZone Device to a non SingNet Broadband connection?
- How do I configure my mobile numbers into the whitelist?
- How do I manually set the CallZone service on my mobile phone for the first time?
- Can I use a 2G mobile phone for CallZone service, even though I have a 3G SIM card in my phone?
- What is the range of the CallZone Device?
- What happens if I have a power or SingNet Broadband outage?
- Do I have to keep my router and CallZone Device powered on at all times?
- How much more do I need to pay for my electricity bills per month if I leave the CallZone Device on for 24 hrs?
- Will I encounter interference with existing SingTel 3G network/other CallZone Devices?
- Are my calls and data usage secure while using CallZone?
- Does CallZone service use licensed or unlicensed spectrum?
- Are there any health or safety concerns with the use of CallZone?
- How do I register my Broadband on Mobile on CallZone?
- CallZone is supported on the following mobile phones.
- Supported Modems/Routers
Product Information
- What is SingTel CallZone Service?
SingTel CallZone uses femtocell technology which is a portable cellular access point connecting 3G and 3.5G mobile devices to SingTel’s core network via broadband.
It is a Value-Added Service (VAS) which enables you to enjoy unlimited mobile usage. The discount is applicable to:
- New and existing SingTel Mobile Postpaid 3G subscribers
- Outgoing and incoming local mobile voice/video airtime within the coverage area
- Usage after bundled airtime* is used up. However, with effect from 1 Jul 2011, 100% discount will apply to usage before bundled airtime* for business mobile subscribers. Residential mobile subscribers continue to enjoy 100% discount after bundled airtime* is used up.
This VAS is not applicable to:
- Prepaid customers
- Subscribers on a 2G SIM or 2G phone
- Mobile data usage
- IDD usage
- Will I enjoy discounts for SMS, MMS and Broadband on Mobile with CallZone?
- Can I call non-SingTel subscribers with CallZone?
- Can SingTel prepaid customers benefit from the SingTel CallZone discounted rate?
- Will I enjoy additional discount on my IDD calls when I subscribe to SingTel CallZone?
- Will voice and video calls made within CallZone utilise my free airtime entitlement based on my mobile plan package?
- Can SingTel CallZone work on other mobile operators’ networks?
- I have subscribed to CallZone. If there is a voluntary TOS (Temporary out of Service), can I continue to enjoy the benefits after I recontract from TOS?
* Bundled airtime can also refer to TalkMore or additional promotional bundled time
No. SMS, MMS and data downloading will be charged at standard published rates even if the service originates from SingTel CallZone.
Yes, within CallZone coverage, you can make outgoing calls and receive incoming calls from non-SingTel Mobile subscribers.
No, SingTel CallZone service is only available to SingTel Mobile Postpaid 3G mobile plan subscribers.
No. SingTel CallZone’s discounted rate is strictly for local mobile calls only.
Yes, the calls made in CallZone will be deducted from your free bundled airtime entitlement. Discount will apply to usage after bundled airtime. However, from 1 July 2011, 100% discount will apply to usage before bundled airtime for business mobile subscribers. Residential mobile subscribers continue to enjoy 100% discount after bundled airtime* is used up.
SingTel CallZone is a SingTel Mobile service offered exclusively to SingTel Mobile customers only.
When you recontract from TOS, you will have to include your mobile number into the whitelist to enjoy benefits of CallZone.
Temporary out of Service refers to temporarily disable of mobile line while retaining number.
For e.g. Customers who are travelling can temporarily disable mobile line and once they are back, they can do a recontract & continue to enjoy VASes (Value Added Services) previously subscribed under the mobile package
Eligibility
- I am registered under the Staff/Family Broadband Plan, can I subscribe to SingTel CallZone service?
- If I change my current mobile price plan to another price plan, can I still enjoy the same SingTel CallZone benefits?
- I have transferred my mobile line to my colleague. Will he/she still enjoy SingTel CallZone service?
- I have transferred my mobile line to another company. Can I still enjoy SingTel CallZone service in my former company?
- I have subscribed to SingTel CallZone. If I change my mobile number, will my CallZone subscription be brought forward to my new mobile number automatically?
- I have subscribed to SingTel CallZone. If there is a voluntary TOS(chargeable @ $5), can I continue to enjoy the benefits after I recontract from TOS?
- I have subscribed to free v019. Can my mobile number be included in the CallZone whitelist?
No. SingTel CallZone is not open to customers under the Staff/Family Plan.
Yes, SingTel CallZone will be automatically transferred to the new mobile price plan.
Yes. Your colleague will still enjoy the service after transfer.
The administrative staff of your former company has to manually remove the mobile number from the SingTel CallZone whitelist. Otherwise you will still enjoy the discount if you make a call in your former company.
Yes, you will continue to enjoy the benefits of SingTel CallZone on your new number.
When you recontract from TOS, you will have to include your mobile number into the whitelist and you can enjoy CallZone.
No. Free IDD service and CallZone service are mutually exclusive.
Service Charges
- Will there be any penalty charge if I terminate the CallZone service?
- Is there any charge if I want to change my mobile numbers in the whitelist?
- Can I enjoy discounted calls when I make a call outside the CallZone coverage area and subsequently move into the zone in the midst of the call?
- Can I enjoy discounted calls when I make a call inside the CallZone coverage area and subsequently move out of the zone in the midst of the call?
- How will I see the CallZone savings on my bill?
- Can I see the breakdown of my CallZone savings on my bill?
- Do I get discounted calls if I add and remove my mobile number in the whitelist several times in 1 day?
- I have signed up for Frequently Called Number Service/BizTalk, can I still subscribe to CallZone? If yes, what would be the knock-off sequence of the discount?
Yes, you can subscribe for CallZone. The airtime knock-off sequence is as such:
- Price Plan Bundle Airtime
- Talk More Bundle Minutes
- Other Additional Free Minutes
- Frequently Called Number/BizTalk
- CallZone

Yes, there will be a Early Termination Charge of ‘Remaining Months x Subscription Charge’ if you terminate the service before contract expiry.
If you terminate within the first month, there will be a Short Notice Penalty in addition to the Early Termination Charge.
No, this is waived until further notice.
No, the discounted calls are only applicable for calls initiated within the CallZone coverage.
Yes, calls that originate in the CallZone are seamlessly transferred to the SingTel 3G network when you leave the coverage area. You will continue to enjoy the 100% discount for the portion of the call that has been transferred to the SingTel 3G network. Once the transferred call has been terminated, any new calls made/received outside the CallZone coverage area will not enjoy the discount.
The total discount will be consolidated under the Discounts and Rebates section in your bill under the respective mobile numbers that are in the CallZone whitelist.
Yes, CallZone call details will be listed on your bill.
If the mobile number is not included in the whitelist at the end of the day (12 midnight), no discounts will be applied for all the CallZone calls made on that day.
Under Example A below, customer will not enjoy discounts for calls made in both b) and d).
Example A
a) Customer adds his number to the whitelist at 10am.
b) Customer makes a call in CallZone at 11am.
c) Customer removes his number at 1pm.
d) Customer makes a call in CallZone at 2pm.
If the mobile number is in the whitelist at the end of the day, discounts will apply for the CallZone calls made on that day.
Under Example B below, the customer will enjoy discounts for calls made in b)
Example B
a) Customer adds his number to the whitelist at 10am.
b) Customer makes a call in CallZone at 11am.
c) Customer removes his number at 1pm.
d) Customer makes a call in CallZone at 2pm.
e) Customer adds his number to the whitelist at 4pm.
With effect from 1 July 2011, 100% discount will apply to usage before bundled airtime for business mobile subscribers. Residential mobile subscribers continue to enjoy 100% discount after bundled airtime* is used up.
Service Usage
- Do I need to manually set my mobile back to SingTel 3G network after I switch off the CallZone Device?
- Will my call drop if I move out of the CallZone coverage area?
No. Your call will be seamlessly transferred from the CallZone network to the SingTel 3G network when you move out of the CallZone coverage area. You will enjoy the discount for the entire call duration as your call originates in CallZone.*
Exclusions
- If you start a data session and move out of the CallZone coverage area, the data session will drop. You will need to restart the session.
- Call may drop for certain Blackberry models or iPhone models.
- You must have a good SingTel 3G network coverage outside the CallZone area for the call to be transferred.
- Will my call drop if I move from SingTel 3G network to the CallZone coverage area?
- How do I know if I am in the CallZone coverage zone?
- Can I take the CallZone Device overseas?
- Can I add new mobile numbers to my CallZone service after it is set up?
- How many simultaneous users can use the CallZone service?
The CallZone service supports 4 concurrent users, regardless of whether they are using voice, video or data services.
For example:
- User A is using data and voice in CallZone
- User B is making a voice call in CallZone
- User C is surfing IDEAS portal in CallZone
- User D is using Broadband on Mobile on CallZone
- User E initiates a call and will be redirected to SingTel 3G network as there are already 4 users logged on to the CallZone Device.
- Can I use my normal phone functions like SMS, MMS and BroadBand on Mobile on the CallZone service?
- Can I make emergency calls in the SingTel CallZone coverage?
- Is the CallZone service dependent on my broadband speed?
No, your mobile phone will automatically log on to the SingTel 3G network.
No. Your call will remain on the SingTel 3G network until you end the call, following which your phone will automatically log on to the CallZone network.
You will hear a ‘CallZone’ announcement before making an outgoing call.
Network display of CallZone/52507/SGP07 may be shown on supported phones.
Network display is dependent on phone models, hence not all phones will show CallZone and some may still display SingTel when they are logged on to CallZone.
No, CallZone service is only supported in your registered address in Singapore. The device will not work if you bring it to another address other than the one registered during sign up.
Yes, you can add up to 16 mobile numbers (residential and business) to your CallZone service via the whitelist portal.
If User A drops the call, the 5th call made by User E will not switch from SingTel 3G network to CallZone. It will remain on SingTel 3G network until User E terminates the call.
* If there are 4 concurrent data calls and there is a 5th data call initiated, the 5th call will be redirected to SingTel 3G network.
Yes, all the voice and data services that you currently enjoy can be used with CallZone service except for location-based services.
Yes, emergency calls can be made in the SingTel CallZone coverage. However, you will not be able to make emergency calls in the event of an electrical power outage, a broadband connection failure, termination of your mobile plan or other service disruption. You must be prepared to report your location to the emergency service operator.
Yes, we recommend that you set up the CallZone service only on 10Mbps and above broadband plans. Your broadband speed is generally affected by the number of activities carried out at any one time e.g. viewing pages on the Internet, sending emails and downloading tunes etc.
Equipment and Installation
- Is the CallZone service dependent on my broadband speed?
- What do I need to get started?
- CallZone Device
- SingTel certified router e.g. 2wire, Aztech
- At least a 10Mbps SingNet Broadband connection (You need to get ready your SingNet broadband username and password)
- 3G Phone on 3G SingTel Mobile plan
- How long do I need to wait for my CallZone Device to power up before my mobile phone can detect the service?
- Can I plug the CallZone Device to a non SingNet Broadband connection?
- How do I configure my mobile numbers into the whitelist?
- How do I manually set the CallZone service on my mobile phone for the first time?
You can switch off and on your mobile phone and it will automatically select the CallZone network for the first time.
Alternatively, you can do a manual network selection for the CallZone network (usually reflected as CallZone / SGP07 / 52507) on your handset. Below are the instructions for different handset models:
-
a. Samsung
Menu > Settings > Phone > Network > Operator Selection > Automatic or Manual
OR
Menu Settings > Network settings > Network selection > Manual-
b. Nokia
Menu > Tools >Settings > Phone Settings> Operator Selection > Automatic or Manual-
c. Motorola
Menu > Settings > Network > Available Network-
d. SonyEricsson
Menu > Settings > Connectivity > Mobile Networks > Select Network-
e. iPhone
Menu > Settings > Carrier-
f. LG
Menu > Settings > Network > Select Network > Manual - Can I use a 2G mobile phone for CallZone service, even though I have a 3G SIM card in my phone?
- What is the range of the CallZone Device?
- What happens if I have a power or SingNet Broadband outage?
- Do I have to keep my router and CallZone Device powered on at all times?
- How much more do I need to pay for my electricity bills per month if I leave the CallZone Device on for 24 hrs?
- Will I encounter interference with existing SingTel 3G network/other CallZone Devices?
- Are my calls and data usage secure while using CallZone?
- Does CallZone service use licensed or unlicensed spectrum?
- Are there any health or safety concerns with the use of CallZone?
- How do I register my Broadband on Mobile on CallZone?
- CallZone is supported on the following mobile phones.
- Supported Modems/Routers
- 2Wire 5012 NV
- 2Wire 2701HGV-E
- Aztech DSL 1015EW
- Netgear WNR3500L
Yes, we recommend that you set up the CallZone service only on 10Mbps and above broadband plans. Your broadband speed is generally affected by the number of activities carried out at any one time e.g. viewing pages on the Internet, sending emails and downloading tunes etc.
Installer will ensure your router is set up with Internet connection. The installer will power on the CallZone Device and connect it to the router. When the CallZone Device LED turns blue, the CallZone Device is ready for provisioning and use.
You will need to wait up to 10 minutes for the CallZone Device to power up and synchronize with the environment.
No. SingTel CallZone service is solely meant for SingNet customers.
You can log in to the whitelist portal to configure the mobile numbers.* You will be prompted to input your CallZone Device Number which is a 10 digit serial number located at the back of your CallZone Device. Please refer to the link http://techsupport.singnet.com/ for details.
* The whitelist portal may be down from 3am to 7am daily for regular maintenance.
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Note: Network display for CallZone is dependent on handset models, hence not all phones will show CallZone as some may still display SingTel. The only way to identify if you are logged on to CallZone is to watch out for the ‘CallZone’ announcement when making an outgoing call.
No, the CallZone service can only work on a 3G SIM card and 3G mobile phone.
CallZone covers up to 30 meters, the exact coverage is dependent on building type.
CallZone requires a constant power and broadband Internet connection to operate. In the event of an outage, your 3G phone will automatically try to obtain a service from the SingTel 3G network if coverage is available.
Yes, you will need to keep the router and CallZone Device powered on at all times. CallZone will not work if you switch the router or CallZone Device off.
CallZone Device is a low-power device, so it consumes very minimal electricity. Typical power consumption is below 18 watts, which will cost less than $3.47 per month (estimation calculated from SP Services).
For optimal coverage, the CallZone Device must be placed in an open area at least 3 meters from the window. For serving area with existing SingTel indoor antennas, the CallZone must be installed at least 10 metres away from the nearest indoor antenna. The CallZone device works best if it is at least 20 metres from other CallZone Devices.
Yes, CallZone uses IP Sec encryption for security.
CallZone service uses licensed spectrum from SingTel Mobile.
Femtocell Forum members are designing their products to fully comply with the guidelines for human exposure to electromagnetic emissions issued by the International Commission on Non-Ionising Radiation Protection (ICNIRP) and other relevant regulatory authorities.
Femtocells emit very low levels of radio waves (also known as radiofrequency (RF) electromagnetic fields) when being used and there is no established health effects caused by Femtocells.
Open your Broadband on Mobile application. Under Network Type, select SGP07/52507/CallZone.


The operator indicated at the bottom of your client should reflect SGP07 / 52507 / CallZone.


# Call drops when moved from CallZone to 3G Mobile Network




















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