custom firmware to fix error 53 (iphone6) ?

Options
hello!
Iphone 6, my home button is brocken (I suppose just the socket !)
restore by itunes => error 53 (touch ID problem), like all the people

APPLE : "replace/change iphone for 320€" ... (just for the home button at 3$ ... great !)

Question : Is it possible to make a custom firmware, for jump the "touch ID" process ? Is it now ?
Thank's for your help

Comments