T-Mobile Galaxy Note 2 - New help Updating my Note 2

[dadecounty3051]

I have a Galaxy note 2 for tmobile, I had rooted my cell phone a while back and recently I wanted to unroot. So I ended up unrooting it but now it won't do a software update nor does Kies detects my cell phone. I need to sell my phone tomorrow and I would like to resolve this issue. Thank you and I hope everyone had a good weekend.