Unrooting Maxx

[mn_voyageur]

Long time lurker, first time posting.

I rooted my phone and froze the updater file using Busy Box, a long time ago.

I am getting ready to migrate to a new phone, but would like to unroot this phone and update to the newest version of Android. (I am on 2.3.6)

Eventually, I would like to wipe the phone, before getting rid of it.

Any help would be appreciated.

Thanks,
MarkN