You have inserted a SIM card in the Galaxy Z Flip 4 but it’s showing a No SIM error or other problems like-
* SIM Card Failure,
* Invalid SIM,
* No Service,
* Constantly Searching for network,
* Insert SIM,
* SIM card not detecting,
The best 4 solutions to fix any SIM not working issues on Samsung Z Flip 4/3/2 easily.
0:00 Common SIM Card not detecting problem
0:29 Solution 1: Restart your Phone
0:49 Solution 2: Eject, Clean reinsert SIM
1:20 Solution 3: Check SIM Card is working or not
1:39 Solution 4: Reset Network Settings