User manual

MITO User Manual
79
deleted due to careless use, repair of the
phone, or upgrade of the software. Please
backup your important phone numbers.
(Ring tones, text messages, voice messages,
picture, and videos could also be deleted.)
The manufacturer is not liable for damage
due to the loss of data.
o Do not turn your phone on or off when the
phone is close to your ear.
Troubleshooting
Phenomena
Possible Causes
Unable to
switch on
1. Does the battery have
power?
2. Is the battery placed
correctly
SIM failed
1. The SIM card is dirty.
Clean it.
2. Reinstall the SIM card.
3. The SIM card is
damaged. Replace it.