3g 8gb erroor 1015 - Apple iPhone 3G

Check out this tutorial: http://www.leawo.org/tutorial/how-to-fix-itunes-error-4013-1361.html

Hola, el error 1015 sucede cuando tienes en un iPhone 3G con el baseband 6.15 (baseband de iPad), prueba restaurar el iPhone con un firmware customizado sin baseband (utiliza redsnow para crear el firmware customizado). Saludos

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To Unlock I-Phone 3G use Remote unlock service...It's best than using Unlock code....Unlock code can be used for other brand phones.But for I-phones Remote unlock service will be suitable ..To get Remote Unlock service for I-phone 3G 8GB model from Theunlockarena.com/apple-iphone-3g/rs13wp9/ and unlock it easily.

Download latest itunes. Use only itunes and update it with original software.

the main difference between the iphone 3g and iphone 3gs is the speed. but here are the specifications for both phones
weight: the 3gs is slightly heavier at 135g memory: iphone 3g only has two options an 8gb or a 16gb whereas for the iphone 3gs it has 8gb/16gb/32gb camera: the iphone 3g has 2mp camera that can only take pictures while the ihpne 3gs has a 3.15mp camera that can also capture videos cpu/processor: iphone 3g has ARM 11 412 MHz, PowerVR MBX-Lite graphics while the iphone 3gs has 600 MHz ARM Cortex A8 processor, PowerVR SGX535 GPU. So the 3gs is faster and it means less or no lag on apps
the 3gs has a digital compass
and the 3gs has a longer battery time than the 3g.
to summaarize, the iphone 3gs is faster, has longer battery life, and has a bigger memory (as it comes with a 32gb version).

The setting might be changed from the phone itself, also check the POP3 settings

yes you can. 8gb is recommended as 16gb may not working propperly.

Your security master code is: 7467617400
Unlock it!

3g uk unlock codes are very hard to get.
it is still not possible to unlock via any software at the moment. so you might need to wait till the unlock solution comes to your nearest local mobile unlocking shop