Network Checker

• For Prepaid users, ensure you have sufficient balance in your account
• For Postpaid users, ensure you have no outstanding amount

• Use your default messaging app/function
• Free up space in your device’s messaging Inbox/Outbox
• Verify if message is unable to send to all numbers or specific numbers / send message to your own number
• If you recently changed from an Apple device to a different model, ensure you have de-registered from iMessage. Insert your SIM card into your Apple device and connect to the mobile network. Tap Settings > Messages and turn off iMessage and restart your device

• For Android devices, go to Settings > Message Settings > Check SMS centre number, +60162999902. For Apple devices, the SMS centre number is automatically set
• For Apple devices, the SMS centre number is automatically set

• Turn off Bluetooth/WiFi and connect to your mobile network
• Toggle Flight mode between on and off
• Update your device's operating system to the latest version

To ensure there are no service disruptions in your area. Subsequent steps can be skipped if there is a network outage.

• For Prepaid users, ensure you have sufficient balance in your account
• For Postpaid users, ensure you have no outstanding amount

• Check if you have any remaining Internet quota balance via MyDigi / Celcom Life app

• Turn off Bluetooth/WiFi and connect to your mobile network
• For 4G devices, ensure 4G is switched on
• Toggle Flight mode between on and off
• Update your device's operating system to the latest version

• Check for possible impact of environmental factors
• Check if there is high volume traffic to a particular app or site
• Check if your 4G/5G device has moved into 2G coverage area
• Check if there is high volume of Internet usage in the vicinity