by Hard Reset
Samsung Conquer 4G Android hard reset SPH-D600 factory reset
Resetting Your Device
Resetting the device restores all the factory defaults, including the ringer types and display settings. All data, including downloaded applications are deleted
1. Go to Menu >Settings > Privacy > Factory data reset
2. Read the disclaimer and tap Reset phone.
3. If you are certain that you would like to restore all factory settings, tap Erase everything.
Use this method to hard reset your Samsung Conquer 4G Android 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.
When your phone has frozen, take out battery and reinsert it. Turn on your phone.
Before you buy a new cell phone or new tablet, please try the following procedure to repair your device. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card before 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.!