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Old 08-13-2012, 07:54 PM   #5 (permalink)
BlackBerry Mensa
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Join Date: Mar 2005
Location: Others run out when we run in
Model: Z10
OS: 10.010219
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Default Re: Used phone but diffierent Sim

The simple answer to "what is a service book" is it's the key in the lock to open the door. No key, no access to the application function.
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