Grandstream GXV3275 User Guide - Manual (Page 53)

Firmware Version 1.0.3.30 GXV3275 User Guide Page 51 of 187
1. Insert the SD card to the GXV3275. The SD card should have the valid firmware bin file in it.
2. Power cycle the phone and the 5 LCD keys on the bottom of the screen will light up.
3. Wait for the LCD keys light to turn off.
4. Once the light is off, immediately press and hold both keys (the first LCD key from the left)
and (the third LCD key from the left) at the same time.
5. Release the keys when the LCD screen displays the upgrading bar.
6. The phone will start the upgrading process.
USE THE ONSCREEN KEYBOARD
The GXV3275 onscreen keyboard can be activated by tapping on an input field.
 English Keyboard
This is the default keyboard on GXV3275. Tap on to access input options to switch input methods.
Figure 23: GXV3275 Onscreen Keyboard - English Keyboard
To switch input between lowercase and uppercase, tap on (lowercase) or (uppercase).
Figure 24: GXV3275 Onscreen Keyboard - Lowercase and Uppercase