Originally Posted by AT1988
well I unrooted it and got it back to factory settings, and installed the update, and Speed Test shows WAY faster results, but it still says HSDPA in "about phone." Is this 4G? I thought 4G was HSPA+
Yes, but now you're unrooted. Didn't need to do that...
Re-root and install this:
[ROM] Ace_Cingular_US_1.84.502.11-Radio-26_06_06 _30_M - xda-developers
This is exact rom you have now, but it is rooted. Best of both worlds...