How to Orange SPV C500 factry reset
1. Press and hold soft1 and soft2 keys.
2. Press and hold power
button for around 1 to 1.5 seconds. Release power button. Keep hold
soft1 and soft2 keys.
3. Later, screen shoould show instructions to
ask user to press '0' key to reset to factory default.
4. Press
'0' within the timeout period, which is only several seconds only.
5. If no instruction is shown on the screen, repeat steps 1 to 4.
The timing is sensitive.
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