Hi, my mom had a Galaxy S3 mini on verizon for about a year and a half then it started rebooting and freezing at the verizon screen at complete random. At first it was every once in a while but it progressively got worse over time. She has sense changed to a Galaxy S4 on verizon and i am attempting to troubleshoot what is wrong with the S3 mini. You can also try dr.fone - Android Lock Screen Removal to bypass pattern, PIN, password & fingerprints for Android devices with NO DATA LOSS:
http://www.resethard.com/m4bn2 Hard reset Samsung Galaxy S3 using this handy guide and you will return your Galaxy S3 back to its original factory settings.
Veja nesse vídeo como fazer o Hard Reset no Galaxy S3 mini (I8200) para desbloquear o aparelho no caso de esquecimento da senha padrão (bolinhas), PIN ou qua

Try booting into Safe Mode (see Android Safe Mode in Galaxy S3 for details if you're unsure). If that is still possible, think whether you've installed any app just before your problem started -- and delete that app from within Safe Mode. Reboot to leave Safe Mode and see whether your problem has been solved this way (hopefully it has!)

The Galaxy S III is the successor to Samsung's best-selling Galaxy S II. It has a bigger, 4.8" 720p display. It also is the first device to have a quad-core Exynos 4412 processor, with each core clocked at a maximum 1.4 GHz. It packs NFC, wireless charging capability, and the latest wireless radios.
4- Fourth step: Several options will appear to reset the Samsung I8190 Galaxy S III mini, the first called “Reset settings” resets the default settings, it is a simpler and less deep reset. The method to remove all the content from the I8190 Galaxy S III mini completely is “ Factory data reset ” click on this option to continue.
How to hard reset SAMSUNG T113 Galaxy Tab 3 Lite. Start by switching off your tablet by holding the Power key for a short while. Now press and hold together: Volume Up + Home + Power button. Release held keys as soon as the Samsung Logo shows up on the screen. Then select "wipe data / factory reset" using Volume buttons to navigate and Power
If your Samsung Galaxy S3 power button is broken, just follow these steps to turn it on. dRESt.
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    • galaxy s3 mini hard reset