Use this method to hard reset your Samsung SGH-i637 Jack phone: Enter *2767*3855#. Warning! All your data including contacts, messages etc. will be lost! Copy all your necessary data/Contacts/Messages etc. to SIM or make backup to your PC before full reset! Take out SIM card before full reset.

1. Once the handset has rebooted to the Today Screen, enter the following code: *2767*3855#. The handset should display a message “Formatting, Please Wait…”
2. The phone will reboot after the Full Reset as this is normal operation.

OR How to Reset My At&T SGH-I637 using buttons?

Samsung i637 Jack hard reset with buttons / keys

How Do I Reset My SGH-I637

To reset the handset's factory settings, via buttons, follow the steps below:

WARNING: This Reset will Delete ALL added Data from the Handsets Memory

1. When the handset is powered off, Press and Hold the 5 key Samsung i637 jack hard reset then power on Samsung i637 jack hard reset button the handset
2. Press either the 1 key (Master Clear) or 2 key (Master Reset) at the Format Menu screen then press the Y key (Yes) at the confirmation prompt

Note: To turn the SGH-I637 (Jack) on or off simply Press & Hold the power button Samsung i637 jack hard reset button, located on the upper left side of the handset.


Samsung i637 Jack hard reset with Firmware update

SGH-i637 Upgrade Tool download from manufacturer's website.

You will need Samsung i637 Jack USB Data Cable (Included In Retail Box - P/N:  APCBS10BBE)

Samsung i637 Jack hard reset from menu

1. From the home screen, press the left soft key for Start
2. Press the left soft key for More
3. Press the left soft key for More again
4. Select Settings
5. Select More (7) to display more settings
6. Select Security (1)
7. Select More (7) to display more settings
8. Select either Master Clear (2) or Master Reset (3)
9. With Device highlighted, press the left soft key for Yes to confirm resetting the handset to the factory default settings

General advice: Before you buy a new cell phone or new tablet, please try the following procedure to repair your device in a software way. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card before doing factory reset. It is impossible to recover your data after doing a hard reset, so online backup is always important. For all of your data, a backup should be done on an external device, hard drive, raid system or media. With or without insurance, if your cell phone lost, damaged or stolen at least your invaluable data is backed up in a safe place. If you are about to sell your phone and you want to wipe your personal data, or if your phone affected with virus you have to do a hard reset. In some cases, you can delete the forgotten password or lock pattern from your device as well. All information is for devices with stock based ROMs. If you are using rooted device, always back up your EFS folder first, containing your IMEI info, etc.! Please also note, that a hard reset operation will not unlock your mobile phone's SIM lock or network lock, but it will remove the unlock pattern, remove the user password or PIN password (NOT the SIM card's 4 digit PIN code). Also note that the firmware version will not be affected in any way, it will not be downgraded, it will remain the same you are using and if you have rooted your device, root privileges remain also unaffected.