[EyeB]

whose towers were you roaming on, guessing verizon for the cdma?
that might be your best shot at a different company

the best plan if i had to switch from sprint's sero is tmobiles 4g prepaid for $30/month for unlimited text/data (unlimited=5gb before throttle) and 100 minutes. 100 minutes would be enough for me, but if it isn't there are voip that uses the "unlimited" data plan

not sure what other carriers you can use evo 3d with :S maybe cricket or one of those small cdma companies but nothing like the coverage of the larger ones (well sprint if you want to keep phone -.-)