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Nokia 3620 hard reset:

Nokia 3650 hard reset:

Nokia 3660 hard reset:

Nokia 3810 hard reset:

Nokia 5000 hard reset: select Menu > Settings > Rest. factory sett. and from the following options...

Nokia 5030 hard reset:

Nokia 5070 hard reset:

Nokia 5100 hard reset:

Nokia 5110 hard reset:

Nokia 5120 hard reset:

Nokia 5125 hard reset:

Nokia 5130 hard reset:

Nokia 5130 hard reset:

Nokia 5140 hard reset:

Nokia 5140i hard reset: