This method never ask to connect internet to sync files.
Just plug the external device to increase the memory.
Other part of the Adapter can install normal SIM card.
Increase external memory of i Phone It can be add external memory for your i Phone with easy installation.
Just place the glowing light near the speaker position according to the guide.
However, installation is not an easy, if users have not some skill about i Phone hardware.
Most of Jailbreak tools and methods install the Cydia automatically after the Jailbreak process.
You must use special software/applications to Jailbreak the Software (i OS) of your i Phone.
I need to restore my i Phone 4 and it is not jailbroken but I'm in Peru I can't find an internet connection fast/consistent enough to update it (750 MB download here will take several hours).
You cannot Jailbreak all i OS versions using just one software.
Following method is the easy way to choose the jailbreak tool and method according to the i OS version and the device.
However, Installment is not an easy process, if you have not technical skill about i Phone assembling.
Use dual Sim on i Phone Dual SIM Adapter is the way to get this option to your i Phone.
Cydia is the most popular 3rd party app manager in the world.