[acE Shanny]

I'm using my internationally unlocked HTC ONE M8 since 2 months. All of a sudden the phone was sometimes saying "No sim inserted" message but after few minutes the phone became normal. After 2-3 weeks no matter what I do my HTC M8 is constantly giving "No sim inserted" error. I tried cleaning the golden spots, readjusting the sim placement, restarting the phone with/without "fast boot" and I even tried the two layer thin tape method but everything failed on me. But apart from "no sim inserted" error, the phone is working perfectly. I even tried doing cache partition then a factory reset but none helped.
P.S- The sim works perfectly fine, I used another phone to check and it worked fine also I did buy a new sim but unfortunately I got the same result.

[lilme08]

I am having the same issue on AT&T version. New SIM, wiped cache as well. Only thing I haven't done was a reset. Guess now its time for a replacement

[acE Shanny]

I contacted with HTC Customer service. They told me to try changing the sim tray and if that doesn't work they'll put it in their warranty.