I hve save shsh but now umbrella can't recognise the phone ang tag ?0, the last firmare instal i think is 4.3 but for now i got no firware and when i try to restore i got error 1600 1301 1013 even 21 once thankk you for fast response

Hello, I have a big concerns of reinstalation firmware the last one I think etait 4.2.1 Operateur AT&T I am under mac I did various jailbreak and maj more an unlock with gevey sim that never has well to work I would want renstaller an any firmware but I fall without umbrella on error 1600...