HTC HD2 Mode D'Emploi

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292  Chapter 1  Managing Your Phone
Performing a factory reset
If a normal reset does not solve a system problem, you can perform a 
factory reset. After a factory reset, the phone is restored to its default 
settings—the way it was when you first purchased it and turned it 
on. You will lose any programs you installed, data you entered, and 
settings you customized on your phone, and only Windows Mobile 
software and other pre-installed programs will remain.
There are two ways to do a factory reset. One way is perform a 
clear storage process through the phone settings. The other way is 
to perform a hard reset by pressing certain buttons on your phone, 
in cases when you are unable to start up your phone and enter the 
phone settings.
Warning! 
Your phone will be set back to factory default settings. Make sure 
that any additional installed programs and important data on your 
phone have been backed up before you perform a factory reset.
Important 
If 
Encrypt files when placed on a storage card is enabled, back up 
all files from the storage card before performing a factory reset 
(Clear Storage or hard reset) or updating the operating  system. 
Otherwise, you will no longer be able to access the encrypted files 
on the storage card. Use ActiveSync or Windows Mobile Device 
Center to transfer files between your storage card and computer. 
After the procedure, copy your files back to the storage card.
To perform a clear storage
1.  On the Home screen, slide to the Settings tab and then tap 
Security > Factory reset.
2.  Enter “12” and then tap Yes.