No need to unroot. I just gave same advice on the Evo 4g forum last week. Dude didn't have any problems. 2 or 3 other people chimed in saying they has no problems returning rooted phone either.
******but it probably is a good idea to flash a stock-ish ROM on it. When I take my Evo into sprint for servicing, though, the techs and some sales people love seeing android 4.0 running on my old Evo.
sent from 2yr old Evo on ICS
Evo LTE=$XXX.XX ~ XDADevs = PRICELESS
Evo LTE. AKA "the beast" . Thanks regaw_lienad, you're a genius.
Kernel: komodo v7
Hboot: lazy panda S-off 1.12.222
Evo 4G HW002
Rom: Deck GB
Kernel: SZ 0.savaged zen21
Recovery: AmonRa 1.80
- thanks whitslack & fastRX8 & Netarchy & Toast, of course. - my Evo: the house that toast built (& many other XDAers)- thank you all