A master reset is sometimes called a factory data reset or a hardware reset (hard reset for short).
A master reset restores the phone to its original factory settings, as if it is new again. As part of this process, it deletes the information stored on the device. Information stored on the memory card or Google account is usually saved. However, some devices give the option to erase information from the memory card.
Note: If you have installed a software update, a master reset does not erase it.
Android can automatically store your settings. However, if you automatically back up and restore your settings when you perform a reset, it can cause any problems to return. T-Mobile recommends that you turn off this feature before anything else. To turn it off, follow these steps:
Make sure you have a Google account on the device and that you remember the password. You need this to store your contacts and calendar.
After the reset, sync the phone to your accounts to restore contacts and other things stored on them.
Make sure your contacts are not stored in your phone memory:
Calendar items are stored on the servers of Google or your Exchange account. After the sync instructions above, you can check them:
Email is stored on the servers of the email provider, not on the device. Downloaded email attachments are stored on the memory card. You do not need to back it up.
Check for any saved drafts of email. Send them before the reset, because they may be erased.
Android does not back up your text messages (SMS) and picture messages (MMS).
Note: There are non-T-Mobile applications in the Market that can back up your messages. T-Mobile does not support these applications, but you can contact the developer for help. You may try SMS Backup (save messages on your Gmail account) or SMS Backup and Restore (save messages to the memory card).
It is recommended that you do NOT restore the messages after the reset. Having many messages can cause phone problems.
Free apps do not appear in the Market automatically. So, you either need to:
Paid applications are already saved to your Google account. So, you can:
If you use Amazon Appstore, it saves all your free and paid Amazon downloads on your account. So, you can:
If the app stored data (save games, high scores, memos, preferences, etc.) on:
Android saves your media (pictures, photos, videos, music) on the memory card. It will be saved.
Note: The Samsung Vibrant is different and can store media on the internal memory. To move the files to the SD card, tap Applications, Files, tap and hold the file or folder you want to move, tap Move, the folder you want it in, and Move Here.
Some Android devices give you the option to erase the contents of the memory card. In most cases, this is not necessary. We advise you not to erase the memory card unless it is completely necessary, because it contains most of your information.
You may choose to erase the memory card if you think that an application has stored corrupted information on it. To back up your memory card, follow these steps:
Thanks to chris21688 for helping to get this document started.
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