After learning a very fair share about Evo's...

1. Do Not Use 3g For PL! Re-read the 3g contract. 3g is not unlimited on Sprint and you will get throttled and most likely permanently.

2. State Rom and kernel. Go to geekfor.me for newest radios.

3. What are your radios, pri, prl versions?

4. Remove ad-free android, it modifies your hosts file and not very well.

5. Do you have any wifi tether software? If so, what ver and busybox version as well.

That's a good start.