Because now iOS 6.1.3 can't jailbreak, so please do not update to the 6.1.3, has been updated to the 6.1.3, please read the following instructions:
iPhone 4S or iPhone5 the latest iOS system unable to unlock the 3G card, need to jailbreak after installation of 3G patches, but iOS 6.1.3 unable to jailbreak ,so if you want useiPhone5 iOS 6.1.3 Work 3G Sim Card ,Please install 3G Activation Code , using GPP Unlock Sim , but only supports the United States iPhone 4S Sprint and Verizon or iPhone 5 Sprint version of 3G card to use , and some kind 3G sim card go internet only using 2.7G(EDGE) network !
Theprogram for Iphone5 download address as below :
(Just support Sprint)
GPP Unlock sim iPhone5 activation card need to problem on Microsoft .NET Framework 2.0 Service Pack 2 or higher version. If it can't run, please download it first: Microsoft .
NETFramework 2.0 Service Pack 2 , http://www.microsoft.com/zh-cn/download/details.aspx?id=1639
The Instruction of the GPP activation program:
1.Please open the activation program, then connect your iPhone 4S or iPhone5 into the PC.
(If something not compatibly, please close them, and add them to believable )
2. Choosing the right SIM card carrier. Note: Unicom is the 3G SIM card, CMCC is the 2G SIM card.
3.Click "INSTALL", Then importation of GPP 12 digit activation code, click the "OK"
4. Now iPhone will popup a Prompt to install the patch,click install;
5. Click install now;
6. Click done, reboot your iPhone;
7. Put your GPP unlock SIM with SIM card in. After reboot you phone, it will got signal, go Settings->General->Cellular ture on the Data Roaming.
You are done here! then wait 1-3min to see ur T-Mobile or ATT logo with signal.
If u waited more than 5min and still don’t see carrier logo , pop out the
sim/sim card and pop it back in or restart it couple time u should be fine. Also
google online for ur APN setting and change the APN setting for DATA MMS is a tricky part, google online for that.Thanks