Jailbroken iPhone 4 won't restore

i jail broke iphone saturday.

turned off when went bed last night , not today not connect at&t can make phone calls. says "searching"

tried rebooting.

tried restore gave me error 21

tried restore in dfu mode gave me error 1600

how heck remove jailbreak?

 

eh well, turns out had setting cydia in tiny umbrella

 

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