Can't watch videos or open safari on my iPhone

A while back I jailbroken my iPhone with red snow. Then my iPhone died and I can't open cydia. Then I noticed that I couldn't watch videos at all on my iPhone and safari won't open! Someone please help I need to uninstall cydia or something but don't know how! I can't do a IOS update right now because no Wi-Fi.

Your best option is just to restore your original settings.

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