Simcard/ handset how do they communicate to each other?
I am hoping someone could walk me through the steps a sim cards takes once it has been inserted in a phone.
Specifically I am looking for answers to these questions below too.
(1) Once simcard is in phone how does it decide if it is eligible to "speak" to handset?
(2) How does a sim card know if a phone IMEI has been blacklisted?
(3) If a phone's IMEI number doesn't appear on the virgin media database will the sim card and phone be incompatible?
I recently purchased a phone to use with my pay monthly contract until I can get an upgrade. The phone is unlocked to any network and indeed works with every other UK network provider apart from Virgin. I am trying to understand the mechanics of the simcard/ handset relationship to determine if virgin sims do some part of the process slightly different which prevents the two from working.
All advice/ info greatly appreciated. I'm determined to get to the bottom of this as I am intrigued with the problem... not to mention I love the phone and would hate to have to give it away/ or change provider).