jailbroken iphone 4 frozen when i tried to reset

i have iphone 4 , it's jailbroken cydia tmobile, 4.01.10; 4.3.5
tried reset settings in order rid of of contacts/pictures/and music , it's stuck on screen it's black screen little white "processing" icon or whatever is showing it's in process. has stayed on hour , i'm sure there's wrong it. holding power , home button down doesn't anything, plugging itunes doesn't anything--it doesnt recognize device! do?!!!

please help!

 

you can't use reset settings on jb phone.

have restore, put phone in dfu , alt-(mac) or shift-(win) restore in itunes

 

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