HTC S621 Smartphone - Answered Questions & Fixed issues

I have the same problem here. But now, it seems to power off occasional even when wifi is not turned on

When on call, press and hold the Green call button.

try to hard reset the phone

try here
http://forum.xda-developers.com/index.php

Tap Start >> Settings, Open "Input" go to word completion and uncheck all the options from there.

To perform a master/hard reset on your HTC S621 you will need to:

1. PRESS AND HOLD BOTH SOFT KEYS (Soft keys are the ones that are the defaults for Start and Contacts near the Green calling and Red end calling keys).
2. WHILE HOLDING DOWN SOFT KEYS, PRESS AND RELEASE THE POWER BUTTON, WAIT 3-5 SEC. (PHONE SHOULD POWER ITSELF ON BY DOING THIS)
3. RELEASE THE TWO KEYS SOFT KEYS.
4. WHEN SCREEN ON DASH LOOKS LIKE IT'S IN DOS FORMAT, PRESS SEND (GREEN ANSWER KEY)

Try upgrade the software on htc.com, it may be a bug. good luck

Try unistalling the software and instal back,might work

Contact the manufacturer by phone or e-mail , they should be able to assist.

HTC Touch Diamond you need to provide IMEI number (15 digits unique number). It can be found by dialing *#06# as a phone number, as well as by checking in the phone settings of your device.This service can unlock all HTC models, it does not matter if the network comes from Europe, USA or any other place (excluding list of unsupported networks), it can be unlocked on our website. Please make sure that your HTC Touch Diamond asks for an unlock code, when you insert a simcard from a different network. You can use any of the provides services, old, new, newest database it doesn't matter.

To Unlock HTC Hero use unlock code...You can get the unlock code fromSimpleunlocking.com/htc-hero/rs16wp9/ and get free unlocking instructions at Mobileunlockguide.com/htc-hero and Unlock it step by step.

Turn it off then turn it back on again.

my best thing to try is to take out the battery or try to reset it

Hi Mike, The link below is a YouTube video showing how to fix your phone, Also there's video's down the right side of the link that may help as well, BUT if that's not the issue then try the other links for white screen....CHEERS.. How To fix any Android Phone Tablet that won turn on white screen on cell phone YouTube Fix for Android Tablet White Screen Issue

Hi Tharu, The link below is a YouTube video showing how to change language to English, I hope this helps...........CHEERS.. https://www.youtube.com/watch?v=tT59mt1sml8 How to change language from chinese to english HTC Smartphone

the digitizer is not connected properly or is broken

May be you dont have internet connection to your mobile.

HTC Bluetooth StereoClip User manual Support HTC United States

Changing the language

1. First solution is to use Google account associated with mobile