Maxcom MM-820 Manual page 19

3：Select LCD backlight and press OK .
4：Select the brightness levels from 1~5 .
Tonesettings(rings&tones)
Tonesetup
1：Press Menu, scroll to and press OK .
2：Select user Profile and press OK .
3：Select go to General and then select the Customizeand press OK .
4：Select the Tone Settings and press Ok
5： Select one of the available tones, the tone will be played.Press OK to confirm,
or press Back to discard changes .
6：Set up the Alarm, Message tone and Keypad tone in the sameway .
Ringtonevolume
1：Select Volume and press OK .
2：Scroll / to change the ring volume, then pressOK .
Alerttype.(ring/vibrate)
Incoming calls can be signalled by a ring tone and/or vibration .
Select the desiredsignalling mode and press OK .
Warninganderrortones
Warning and error tones are used to alert the user of low battery power, phone
and SIM card errors, etc .
1：Select Warning and press On/Off to enable/disable it .
2：Select Error and press On/Off to enable/disable it .
3：Press Done to save .
Silent
Silent profile is a fixed profile with SMS and ring signals disabled,