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Reset Samsung Focus S SGH I937 to Restore Factory Settings - Samsung Focus S SGH I937 features a large 4.3” Super AMOLED and electrical phenomenon touchscreen (480 x 800 pixels resolution) with Multitouch, Touch-sensitive controls, measuring system and Proximity detector. The phone uses Microsoft Windows Phone 7.5 Mango software in conjunction with 1.4 rate Scorpion C.P.U. and 512 MB RAM. It offers 16GB/32GB internal storage (optional) while not memory card slot. The property options consist of: Wi-Fi 802.11 a/b/g/n; Bluetooth v3.0 with A2DP, EDR; and microUSB v2.0.

You can reset your Samsung Focus S SGH I937 to restore the original factory setting by following below instructions:

From the Home screen, touch  ➔ Settings  ➔ system ➔ about ➔ reset your phone.

OR

When the device vibrates, release the Power key, but continue pressing the Camera andVolume down keys. Once the device displays the Are you sure you want to format? screen, release the Camera andVolume down keys. (see picture for detail illustration)