20 Most Recent HTC S621 Smartphone Questions & Answers

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.

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