I did not create any of this software I will give you links and directions to get everything working please thank the people that made this possible.
Before you do any of this you need to change your epst settings to the setting for your cricket account. press ##778# and hit call (may be ##778 ) hit edit try 000000 for the password if that doesn't work try this
http://forum.ppcgeeks.com/showthread.php?t=43560
Change the MSID(get from cricket or old phone) and Mobile directory number to your 10 digit #
There may be some more setting needed to get evdo working I will post them when I get a chance for now search for cricket evdo(3g) settings HTC or something.
Get your cricket PRL search google put the prl in the root folder of you sd card, go to prl in epst setting and change it.
You need to security unlock your phone in order to flash custom roms look here
http://forum.ppcgeeks.com/showthread.php?t=93252
First off download the Mighty rom look here
http://forum.ppcgeeks.com/showthread.php?t=79579
Just exit out of the provisioning or soft reset when it comes up.
Second get the Cricket MMS & Wap cab from
http://forum.ppcgeeks.com/showthread.php?t=81027
The next step
Soft reset go to settings/all settings/connections/advanced/select network select Cricket click ok to save.
Go back to connections select manage existing connections under cricket, go to modem, click cricket mobile web select edit, hit next twice enter your 10 digit number where it says to. Enter cricket for the password. Finish
Soft reset and everything should work.
Sometimes my phone has trouble connecting so I go to settings hit communications and turn Data off and back on then it works fine.
PM me if you have questions.
Good Luck.
Hit thanks if this helped you