A touchscreen phone with a frozen display is about as much use as a snooze button on a fire alarm. If your Samsung Pixon's screen decides to temporarily give up the ghost, you won't be able to make or receive calls, access the Internet or use its 8-megapixel front-facing camera. In most cases, it will be possible to solve the problem in a couple of minutes. If your screen's repeatedly freezing up, you'll need to take more drastic action.
Hold down the "Power" button on your Pixon to turn it off. Once it's powered down, hit the same key again to turn it back on again. It may be a cliche, but turning your phone off and then back on again could sort your problem out. If your screen is fixed when you turn your device back on, you'll need to enter your PIN to get access to its operating system and make calls.
Flip your phone over and take off its battery cover if turning it off and back on again hasn't had the desired effect. Whip out the battery and then pop it back in again. Turn your phone back on and enter your PIN if all is well.
Try a hard reset if your device repeatedly freezes up after sorting itself out for a while following the preceding steps. Back up your data and address book to your computer before doing so by connecting your device to a PC with Samsung software on it. Then tap "_2767_3855#" into your handset. Your phone will revert to its factory settings and you will lose all your personal files and data. Performing a hard reset will rid your Pixon of any malware that may have been causing its screen to freeze up.