iPhone Cannot Update from IOS 7.1.2 to 8.1

[hiranuk]

I have a iphone 5s GSM, when I try to update from 7.1.2 to 8.1 on iTunes is get a message "cannot update firmware as firmware is incompatible". I understand that apple is still signing ios 8.1 so why cannot I update? I have checked that I have download the correct ISPW firmware for my model, I am using the latest version of ITunes.

Any help appreciated

 

[tvbi]

try download the CDMA ispw. This happened to me before where they have the CDMA and GSM links mixed up.

 

[navodwickra]

I have a iphone 5s GSM, when I try to update from 7.1.2 to 8.1 on iTunes is get a message "cannot update firmware as firmware is incompatible". I understand that apple is still signing ios 8.1 so why cannot I update? I have checked that I have download the correct ISPW firmware for my model, I am using the latest version of ITunes.

Any help appreciated

does it(ipsw file name) say iPhone 6,1? which is GSM not global.

 

[hiranuk]

it says

iPhone 5s (GSM) - iPhone6,1_8.1_12B411_Restore.ipsw

my iphone model is A1457

is this the correct firmware I should be using

 

[Ken Kaniff]

it says

iPhone 5s (GSM) - iPhone6,1_8.1_12B411_Restore.ipsw

my iphone model is A1457

is this the correct firmware I should be using

Yes that's the correct firmware for that phone. Sorry I can't help with the problem though. Good luck my friend.

 

[Snide]

Why not stay on 7.1.2?

I will never consider "upgrading" before BiteSMS is ready (if ever) for IOS 8.

 

[Skizzy]

Maybe the signing window finally closed.

 

[bbrks]

Noup, Apple is still signing it. Hiranuk, did you put the phone into DFU and than SHIFT + RESTORE?