iPhone 3GS after upgrading 4.1 to 6.1.3

[punshukwangdu]

Hi ..I was using iPhone 3GS..I upgraded iOS 4.1 to 6.1.3........and It was showing No Service..

When I ran redsn0w s/w..it worked..But problem is whenever my phone got switched off due to battery down or no signals or restart mobile..then my phone will be showed as No Service..

Pls suggest me if any software available to avoid No Service on my phone permanently.

Thanks in advance

 

[willerz2]

I've taken the liberty of moving your thread over to the Jailbreak section as it doesn't fit the iPhone Apps section.

Were you using UltraSn0w for an unlock prior to your 6.1.3 upgrade? And also what bootrom is your 3GS: new or old. You can tell by either the model which is either MB or MC, or by the 3rd, 4th and 5th digits of your serial number. If it's a new bootrom, then your only option for unlocking your device permanently would be to purchase a carrier/IMEI unlock