An unbanned KV if yours is banned. Then from that point pick an Xbox Live stealth service and buy a token. If you want to play with other RGH/JTAG owners you can install FSD or Aurora and play on LiNK.
There is far more options than Stealth. For example the one I'm apart of is called Synergy, but it's not released yet. But if you want to go online for free, try XboxLiveLogon. I tested it, and it lasted me almost 6 days on one unshared KV. That's not bad for a free bypass. If you would like help installing it, please PM me and I can help guide you along.