Stuck on boot

[Android Question]

I have Galaxy s2 and tried to unroot the phone and go back to stock firmware. Used odin to install firmware again and everything went fine. Now the phone only loads into the samsung load screen and stays in a loop loading it over and over. Any help would be appreciated.

 

[Hadron]

If the firmware wasn't the same as you were running previously then system data may be incompatible. This could produce this result. If so a factory reset (which will wipe all data) will fix this.

I'm not familiar with Samsung's, so can't give explicit instructions for how to do this, but you should be able to do it from recovery. Pull the battery to force a shutdown, then there will be some combination of buttons you press while rebooting to get into recovery.

Good luck