by Hard Reset
Samsung i780 hard reset
Press and hold CALL + END + RESET (HOLE) buttons, then press Space for FORMAT Samsung i780.
Warning! All of your data will be lost!
1. Press and hold call and end call buttons together +
2. Press RESET with stylus
3. Hold them until LED turns red, then release RESET, keep pressing call and end call buttons until prompt message
4. Press space to format phone.
Samsung SGH-i780 soft reset
If your Samsung i780 frozen or not responding just take out the battery and reinsert it.
Use this method to hard reset your Samsung i780 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.
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.!