Huawei G2157 User Manual page 7

Press...
In standby mode, press the key once to enter *,

press and hold the key to enter P.
Display the symbol list in any input mode.

Enter #.

Lock the keypad in standby mode (by pressing

and holding the key for about 3s).
Change input modes when editing texts.

If the phone cannot be powered on after you press and
hold
used up. In this case, charge the phone for five minutes
(during this period, the charging animation may be not
displayed on the screen) and power it on again.
, the reason is probably that the battery is
4
To...