Phone says dialing, but never connects, no ringing sound. Sometimes after power cycling can make two or three calls. Often does not get data connection, though even when shows 4g cannot access data services. When others call, they go to vox mail. No ring or notification on phone. No error message.
Have tried several trouble shooting steps: Have tried different network modes. Have tired manually selecting T-Mobile. Have booted into safe mode. Have cleared the cache. Have done factory reset. Have tried different know good T-Mobile SIM card, and finally I replaced the SIM & SD Card Reader Module.
Nothing has had any effect, can anyone suggest a next step?