SOURCE: i want do master reset with my i mate jama 101 as
reinstall window or update your mobile window
SOURCE: not opening the contacts and not having any sim network
HARD
RESET
1)
Start->Settings->System tab->Master Clear->1234->ok
2)Press soft-reset for 15sec.
3)Remove the battery, Simultaneously hold volume(-) button and red
hangup button, while still holding those keys, insert the battery and
wait for the led to go out, release keys and device will hard reset
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