OK so here's the issue i have a stock HTC u11 phone which completely stopped working last week. It gave me a com.android.phone is not responding error message. For me this was a simple fix. Clear the Cache start fresh problem solved. So far no luck. Go Deeper clear the Cache Partition restart problem solved. No luck. Go Deeper Factory Reset the phone as i've got 0 connectivity though wi-fi or mobile. And Still have the same issue. Trying to access the Sim toolkit on the completely wiped phone still give me the same error message of com.android.phone is not responding and it still doesn't recognize the SIM card or allow wi-fi to turn on. Any suggestions?
HTC U11 unlocked - Solar Red
Android 9
Firmware 3.37.617.1
HTC U11 unlocked - Solar Red
Android 9
Firmware 3.37.617.1