A device once had a mobile derivative of Ubuntu, but OP wants to revert to Android OS...is this on-topic or belong somewhere like generic linux or android enthusiasts?
I would say yes, he flashed the phone from Android to Ubuntu and wishes to go back. Most of the time it's a tough call but I know the Ubuntu Touch team watches their respective tags and we "support" to an extent flashing from Android to Touch then back to Android.
Also, that question is answered and marked as answered over a year ago. We're not going to close old questions "just because" it breaks a policy especially if it's got an accepted answer.
I think you are asking the wrong question. These questions are rather simple to answer (once) or link to a duplicate.
The tricky part may be certain specific devices, in these cases the answer should be that the device is (obviously) not supported by Ubuntu Phone/Touch and therefore not here.
From the Android Enthusiasts perspective I wouldn't want the question there, because I wouldn't know what the Ubuntu Tools did to the device (like installing a custom recovery image).
If possible, treat it like a blank device where you want to install a certain operating system.
- Officially supported Ubuntu Phone devices
- Answer here, link to duplicate or instructions on the Wiki.
- Not supported devices:
- Answer with link to generic guide that gives instructions how to reflash (non-locked) Android devices and a comment that the device is not supported on Ubuntu.
- Where can I find stock or custom ROMs for my Android device? would possibly be a good starting point.
And possibly link all duplicates to these two questions.