Buy a new PDA or take it to the phone company.
In order to unlock the touch screen of a PDA you will need to refer to the user manual that came with the PDA. Unlocking the screen is different for each PDA and there is no standard way to do so.
It varies. They hardly ever exceed 3 in. by 6 in.
push the pda up
Go all the way to the right on your PDA to the "Info" tab and it will be at the top of a list.
There are several PDA that offers full color, treos from palm offers a pretty good color screen, however blackberry offers great sharp color and wonderful contrasts.
hit the select button on he controler
I would recommend the Toshiba Pocket PC E400 PDA if you are planning to play games on your PDA - it's large screen offers a better view of the game.
Depending on if you have one or not, this place is a good spot to go to. http://www.geeks.com/products.asp?cat=PDA
RTFM!
screen backlight
Cheats are only available after the October 31, 2008 online update is applied to your game. While playing the game, activate the PDA, and press LB, RB(2), LB, RB, LB(2), RB(3), LB to enable cheat mode. Then, close the PDA. If you entered the code correctly, a message will appear. Activate the PDA again, and enter one of the following codes at the PDA screen to activate the corresponding cheat function. Note: Achievements are permanently disabled for the current save/profile when cheats are activated. InvincibilityAt the PDA screen, press Up, Down, Left, Down, Right(2). This code will affect both players if enabled in Co-op mode.Infinite ammunitionAt the PDA screen, press Up, Down, Left, Right, Left(2).Refill fuelAt the PDA screen, press Up(3), Down(3).All vehiclesAt the PDA screen, press Up, Down, Left, Right(2), Left to unlock all vehicles.All suppliesAt the PDA screen, press Left, Right(2), Left, Up(2), Left, Up to unlock all supplies.All costumesAt the PDA screen, press Up, Right, Down, Left, Up to unlock all costumes.All airstrikes except NukeAt the PDA screen, press Right, Left, Down, Up, Right, Left, Down, Up to unlock all airstrikes except the Nuke.NukeAt the PDA screen, press Up(2), Down(2), Left, Right, Left, Right to unlock the Nuke.Grappling hookAt the PDA screen, press Up, Left, Down, Right, Up to unlock the grappling hook. This code will affect both players if enabled in Co-op mode.
Cheats are only available after the October 31, 2008 online update is applied to your game. While playing the game, activate the PDA, and press LB, RB(2), LB, RB, LB(2), RB(3), LB to enable cheat mode. Then, close the PDA. If you entered the code correctly, a message will appear. Activate the PDA again, and enter one of the following codes at the PDA screen to activate the corresponding cheat function. Note: Achievements are permanently disabled for the current save/profile when cheats are activated. InvincibilityAt the PDA screen, press Up, Down, Left, Down, Right(2). This code will affect both players if enabled in Co-op mode.Infinite ammunitionAt the PDA screen, press Up, Down, Left, Right, Left(2).Refill fuelAt the PDA screen, press Up(3), Down(3).All vehiclesAt the PDA screen, press Up, Down, Left, Right(2), Left to unlock all vehicles.All suppliesAt the PDA screen, press Left, Right(2), Left, Up(2), Left, Up to unlock all supplies.All costumesAt the PDA screen, press Up, Right, Down, Left, Up to unlock all costumes.All airstrikes except NukeAt the PDA screen, press Right, Left, Down, Up, Right, Left, Down, Up to unlock all airstrikes except the Nuke.NukeAt the PDA screen, press Up(2), Down(2), Left, Right, Left, Right to unlock the Nuke.Grappling hookAt the PDA screen, press Up, Left, Down, Right, Up to unlock the grappling hook. This code will affect both players if enabled in Co-op mode.