Samsung a51 4g and VoLTE problem solution
Here are some possible solutions to your problem:
1. Activate VoLTE: Open the Settings app on your Samsung Galaxy A51. Tap Connections. Tap Mobile Networks. Tap the status switch beside VoLTE Calls to toggle it on and off. If you want to use VoLTE, tap the VoLTE Calls option and enable it
2. Reset network settings: Resetting your network settings can help resolve connectivity issues. To do this, go to Settings > General Management > Reset > Reset Network Settings 2
3. Remove and reinsert SIM card: Try removing your SIM card from your device and reinserting it again
next level only for mobile phone technicians

1 change TRANCEIVER then not work
2 change HIGH BAND PA then not work
3 change MAIN CA FEMID still not work
4 REBALL CPU
Here are some possible solutions to your problem:
1. Activate VoLTE: Open the Settings app on your Samsung Galaxy A51. Tap Connections. Tap Mobile Networks. Tap the status switch beside VoLTE Calls to toggle it on and off. If you want to use VoLTE, tap the VoLTE Calls option and enable it
2. Reset network settings: Resetting your network settings can help resolve connectivity issues. To do this, go to Settings > General Management > Reset > Reset Network Settings 2
3. Remove and reinsert SIM card: Try removing your SIM card from your device and reinserting it again
next level only for mobile phone technicians

1 change TRANCEIVER then not work
2 change HIGH BAND PA then not work
3 change MAIN CA FEMID still not work
4 REBALL CPU