Well there could be a reason your kv's are not lasting and some tips for you to read

1. The kv sellers you go to are giving you shared Kv's
2. Connect to a VPN so you have a better time befor being banned
3. Forgot the name of it but spoof your gamertag so people cant report you

Try doing the vpn if you haven't already and see how that works out also ask your friend what he does and do exactly what he has done.

Monster-Munch wrote Well there could be a reason your kv's are not lasting

1. The kv sellers you go to are giving you shared Kv's
2. Connect to a VPN so you have a better time befor being banned
3. Forgot the name of it but spoof your gamertag so people cant report you

Try doing the vpn if you haven't already and see how that works out also ask your friend what he does and do exactly what he has done.

I'll do #2 but I need help setting up VPN. #1 can't be possible because I'm a kv seller as well lol and I know the supplier very well that I can guarantee it's 100% unshared.

SurgeThe420 wrote You are most likely being sold Shared KV's.
VPN's do help a little bit but not much.
And Monster-Munch is talking about an XUID/XOSC spoofer.

I would suggest buying from my friend as at the moment he is selling unshared kv's for $13 when you say "XeMagic sent me" to him. It could also be the server so PM me for working offline files
The guy who is selling cheap KV's contact information-
AIM: becominghype
SKYPE: xmace3

Hope I have helped

thanks but I'm good. I already have lifetime stealth from XBL hammer and would not waste my time for offline files.