In this video, I demonstrate a Racal 6103E digital radio test set working with an original iPhone. A test set such as this is designed to serve as a very low-power cellular BTS that a phone can connect to, and from there perform tests on the connected phone. I also explain how to program a SIM card for use with this test set, allowing more modern GSM devices to interact with it.

Stock ROM images: http://dosdude1.com/files/racal/RACAL...

SIM programming software: http://dosdude1.com/files/cellular/GR...

SmartCard reader/programmable SIM cards: https://www.aliexpress.us/item/325680...

SIM card data:
PIN: 0000 0000
PUK1/2: 11111111 22222222
Ki: 5E4AB35891375D2AEE812E67C309A629
IMSI: 001010123456789
Admin Field/ADM: 80