After 31 July 2024:
1. Users with 3G-only SIM cards or 3G phones will no longer have access to voice, SMS, or data services.
2. Those with 4G phones that don't support VoLTE will lose the ability to make voice calls but can still use SMS and mobile data.
How to check
If your phone displays "3G" or "H+" in the network bar when Wi-Fi is off, it's likely a 3G-only device that will stop working after the 3G shutdown.
What to do
You'll need to upgrade to a 4G/LTE or 5G-compatible phone and ensure that VoLTE is enabled to make voice calls.
(Check the VoLTE Section here for more details)
Consider upgrading your phone with the latest online mobile offers here.