4:11 Years ago in the old analog days, some cell phones allowed you to have two different carriers on the phone. This was done for those who went into a different area and also had an account there and you could switch to that area and avoid roaming and long distance charges. I don't know if it's possible today to switch to a different carrier with a single phone anymore.
Mobile phones are generally tied to a cell network through a Subscriber Identity Module (SIM) card. The SIM is an integrated circuit designed to store data needed to identify and authenticate the device to the cell network. Replacing a SIM card for one network with a SIM card for another network will typically allow for the phone to work on the other network. (I'm skipping details about nonsense that some carriers will do to try to lock the device to their network.) Some "dual-SIM" devices will allow you to move between networks without having to switch the SIM card; they're both in the phone and you can use one, the other, or both, as needed.
@@KD8TTE Thank You for sharing the information regarding dual sim technology. This is the first i have heard of this. I always learn something new from your video presentations good sir.
I recall such a phone 2 different carriers AND 2 different phone numbers... I don't recall how exactly it was set up.... But then again we had radios Sadly back then LEO could not talk directly with FIRE nor EMS, NONE in our county could talk with the next county over ect... I know some of our officers carried HTs .... Dispatch did have a base station that could talk with the counties around us-- dispatcher to dispatcher only, .... those days were a night mare. Each department had it's own PACE plan.
4:11 Years ago in the old analog days, some cell phones allowed you to have two different carriers on the phone. This was done for those who went into a different area and also had an account there and you could switch to that area and avoid roaming and long distance charges. I don't know if it's possible today to switch to a different carrier with a single phone anymore.
Mobile phones are generally tied to a cell network through a Subscriber Identity Module (SIM) card. The SIM is an integrated circuit designed to store data needed to identify and authenticate the device to the cell network. Replacing a SIM card for one network with a SIM card for another network will typically allow for the phone to work on the other network. (I'm skipping details about nonsense that some carriers will do to try to lock the device to their network.) Some "dual-SIM" devices will allow you to move between networks without having to switch the SIM card; they're both in the phone and you can use one, the other, or both, as needed.
@@KD8TTE Thank You for sharing the information regarding dual sim technology. This is the first i have heard of this.
I always learn something new from your video presentations good sir.
I recall such a phone 2 different carriers AND 2 different phone numbers... I don't recall how exactly it was set up.... But then again we had radios Sadly back then LEO could not talk directly with FIRE nor EMS, NONE in our county could talk with the next county over ect... I know some of our officers carried HTs .... Dispatch did have a base station that could talk with the counties around us-- dispatcher to dispatcher only, .... those days were a night mare. Each department had it's own PACE plan.