Help How to Downgrade from 5.1 Lollipop

[Lana30]

I have a S3 sgh-t999 and I want to downgrade to the previous version, how do I do that? Thanks.

 

[Blu8]

You flashed a custom rom to get 5.1.1 on an s3, no doubt about that. Did you make a backup before you flashed the lollipop rom?

 

[codesplice]

I have a S3 sgh-t999 and I want to downgrade to the previous version, how do I do that? Thanks.

You say SGH-T999 (which is the T-Mobile variant), but your forum profile says you're on Sprint.

Can you confirm which device you have?

 

[Lana30]

You say SGH-T999 (which is the T-Mobile variant), but your forum profile says you're on Sprint.

Can you confirm which device you have?

Hi..T-Mobile, my mistake, my sister has sprint, ha ha

 

[Lana30]

You flashed a custom rom to get 5.1.1 on an s3, no doubt about that. Did you make a backup before you flashed the lollipop rom?

Yes I did

 

[Blu8]

So to be clear you want to go back to the way your phone was before you flashed the rom or you want to revert to a previous version of the rom? If it's the former and you do have a backup of your stock rom then restore it. If it's the latter then you can always dirty flash the previous version or clean flash it to avoid any bugs.