I bought a new HTC One (M7) in Switzerland for a Thai friend. When I turn on the phone, I can select a language in the list of the pull-down menu. The Thai language is missing in this list and I would to add this language.
1. Can I get the Thai language if I flash the phone with a firmware using ODIN?
2.a Which firmware should I use to get the Thai language, and where to download it? I would like to use the HTC official firmware, this one pre-installed in HTC One sold in Thailand.
2.b Same question for the Samsung Galaxy S4.
3. If I understood the guide below, a hard-reset* will not reset the phone to the original HTC firmware pre-installed on the phone when I bought it. Isn't it?
* After flashing the phone with another firmware.
Thanks in advance and regards.