Hi guys, please read the warning. Please note this phone has been disassembled before that's why it is much easier for me to remove the back cover if your phone has never been opened before will be harder to remove it, as the back cover is glued to the frame in the case, I would recommend to also apply some heat with hot-air gun or hair dryer on the frame to loosen up the glue. The back cover can be easily damaged in process off opening, so you may order one spare in the same time, with a battery also be very careful with the LCD touch-screen flex cables. If you damage them, you will need to replace the whole screen. Keep in mind. The HTC One m7 is still one anti, most difficult smartphone to repair according to I, fix, ranking and good luck, Oh and.
Source : Electronic Gadgeteering