[iMore Question]

I bought an iPhone 3GS running ios 4.1 (used). I bought the phone to run a specific ios app. That app required ios 5.1 or later. I upgraded to ios 6.1.3 from itunes software. (as itunes prompted me). After upgrading, i chose English language and country to India to setup. After that, I connected to wifi. I got error like "apple server is busy. try after sometimes....' I used itunes option too. I got error "SIM card is not inserted"

I want to solve this issue withouting downloading any big ipsw file. I have original ios 6.1.3 on my pc. Please help me solve jailbreak it. Unthered JB is preferred.

[Ipheuria]

When you Jailbreak it should get rid of the insert SIM issue. The phone was probably already JBen which is why it was on such an old iOS version. I don't know if there is a JB for the 3Gs on 6.1.3 I'll give you the info I have and you'll have to see which one works for you.

Windows
iClarified - iPhone - How to Jailbreak Your iPhone 5, 4S, 4, 3GS Using Evasi0n (Windows) [6.1.2]

Mac
iClarified - iPhone - How to Jailbreak Your iPhone 5, 4S, 4, 3GS Using Evasi0n (Windows) [6.1.2]

6.1.3
Windows
iClarified - iPhone - How to Jailbreak Your iPhone 4 Using RedSn0w (Windows) [6.1.3]

Mac
iClarified - iPhone - How to Jailbreak Your iPhone 4 Using RedSn0w (Mac) [6.1.3]

You can try to get the 6.1.2 ipsw for your 3Gs and try to restore using that ipsw. I don't know if that will work since you've already upgraded to 6.1.3 but it's worth a try.

[Laelipoo]

The phone was probably unlocked as well, and by updating it, you may have destroyed the unlock. depending on its baseband (under settings) you may be able to fix that.