Update Samsung Galaxy S3 – I9300 to Android 5.0.3 Lollipop

Step by step for installation

Rom managers

Root telefon

Clockwork mod

Enable debugging

Android SDK



How to unroot Samsung Galaxy S3 device

Because of warranty I needed to unroot my S3. After a lot of searching I found following articles which helped me to revert my phone to factory defaults.

Used software

  • TrianglAway¬†– tool for reseting flash-counter inside the android firmware
  • SamMobile – server with all Samsung S3 firmwares
  • Samsung Updates¬†– Official Samsung site with all firmwares