galaxy ace 2 downgrade to gingerbread

[peterfc]

Hi my galaxy ace 2 was "upgraded" to jelly bean when I returned it to O2 for repair. Result so.ooo slooo.w

Can any one please advise how to reinstall gingerbread on an O2 locked phone or do I need to return to O2.

Many thanks Peter C

[Anonymous]

I don't believe you can downgrade it without rooting it which would void the warranty
Maybe @MI5 could assist

[Anonymous]

I believe this trips the Knox flag and voids manufacturers warranty.

If you perform a a google Search and look at YouTube etc you will find the avenues to go down.

We cannot discuss rooting here as per forum rules.

[MI5 · Accepted solution]

No need to root and no Knox on your device.
I'll get you the link to my Odin guide in a min and you need to get your firmware off www.sammobile.com

[MI5]

Odin guide
http://community.o2.co.uk/t5/Android-Devices-Samsung-HTC-Sony/HOW-TO-A-Guide-to-using-Odin/m-p/46346...

[Anonymous]

When did they start adding the Knox rich?

[Anonymous]

Are their any pit falls risks or possible issues caused by downgrading @MI5 ?

[MI5]

---

@Anonymous wrote:
When did they start adding the Knox rich?

---

Currently only S3 and above but it's not enabled on S3 however you do have the Knox kernel.

[MI5]

---

@Anonymous wrote:
Are their any pit falls risks or possible issues caused by downgrading @MI5 ?

---

None other than not been on latest firmware.

[Anonymous]

Thanks