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Announcement

We're saying goodbye to 3G

Last updated 01 Mar 2024

Farewell 3G! Zero1 is shifting to a fully 4G and 5G network

Singapore’s 3G services will be retired on 31 July 2024 in view of advancements in the mobile communication space where 3G has been largely replaced by 4G and 5G. This is in line with the statement from the Infocomm Media Development Authority (IMDA), which mentioned that the move will allow 5G to “provide a better experience for users and support enterprises undergoing digital transformation”.

All of Singapore’s mobile operators, including Zero1, are targeting to close all 3G mobile services on 31 July 2024. If you use a 3G device or a 4G non-VoLTE device and do not upgrade to 4G or 5G device, you will not be able to make calls, send texts, or use data services.

1. Check if you're using a 3G mobile phone

You will see a 3G or H+ network bar in the top-right corner of your phone screen all the time. 

3G Only Mobile Phones Signal - Zero1 Banner

2. Check if your 4G mobile phone supports VoLTE

From your phone’s settings, click ‘Connections’ > ‘Mobile networks’, and look for the VoLTE option. You will not be able to find the option if your device does not support VoLTE.

Apple and Android - VoLTE Settings - Zero1 Banner

3. Upgrade to a 4G or 5G mobile phone with Zero1

If you’re on an older, incompatible mobile phone, you would need to switch to a new phone to make calls, send text, or use data services. ​You can consider getting an OPPO or OnePlus phone bundle for your upgrade.

General FAQ

What does the 3G closure mean?

All mobile operators in Singapore are targeting to stop providing 3G services on 31 July 2024. This means that voice calls, SMS and mobile data on 3G will not be available, including certain emergency services. 

Please upgrade your phone to enjoy full connectivity.

Do all 4G phones support VoLTE?

Not all 4G phones support VoLTE and your call services will be impacted if your device does not support VoLTE.

You can check here for the list of compatible phones.

Would Zero1 support VoLTE?

Zero1 is currently working with our service provider to enable VoLTE for you without additional cost. The service will likely be available before 31 Jul 2024.

VoLTE provides high-quality voice calls, faster call setup times, multi-tasking capabilities, better coverage, and enhanced features.

Is a SIM card change required?

Our SIM cards are all 4G enabled and there is no need for you to change your SIM cards.

Having issues?

We are happy to help, just message us on Facebook or send us an email at yes@zero1.sg should you encounter any challenges. 

More information

Zero1 develops life solutions by making it #AllAbout you, ensuring that you receive #OnlyTheBest that we have to offer and striving to help you live your life with #ZeroLimits.

Zero1 is a licensed Mobile Virtual Network Operator (MVNO) that provide a number of mobile plans with unlimited data. Do check out our other offerings on the Zero1 website today.

What's the reason to shut down 3G?

Singapore introduced 3G in 2005 and 4G in the 2012. Since the launch of 5G in 2022, 99% of mobile users in Singapore have adopted 4G or 5G while the number of 3G users continue to drop.

In line with the statement from Infocomm Media Development Authority (IMDA), more bandwidth becomes available for investing in 5G as 3G networks retire, providing a superior experience for users and supporting businesses in their digital transformation journey.