Here is the instruction to crack MyWi and My3G app as follow:
1) Download ROCKAPP, MYWI, and MY3G
2) Run BOTH MYWI and MY3G Get a damn LICENSE! You need it! [i]Make sure you got the LICENSE[/i]!
3) Once you got your license you can delete MYWI
4) Install MYWI (NO ROCK) from elpelle6.com/repo
5) then go ahead and delete MY3G
6) Install MY3G (NO ROCK) from elpelle6.com/repo
7) delete ROCKAPP
8) Reboot (twice might be necessary)
*NOTE: DO NOT TRY TO RUN MYWI or MY3G until you finish step 8!
Now you have NO ROCK. Working MYWI and MY3G CRACKED and it doesn't bother you about how many days left on trial.
MyWi Create a WiFi HotSpot with a press of a finger! Wherever you are - you can connect your laptop or other mobile device to your iPhone easily. MyWi has been rebuilt from scratch to bring tethering support to iOS 4! Will work with all jailbroken iPhones (including 2G/3G/3GS/4) and iPad on 3.1.2 or later.
My3G: Take back your 3G! My3G makes Apps believe that they are on WiFi instead of 3G. With My3G, you can now watch HiDef YouTube videos, use Skype/Fring/Other VOIP apps over the 3G network!