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Do I use my old SIM or the new one?
- Thread starter Anthony T
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I moved from an original to a 3G S.
The 3G S has a sim card in it, so AT&T will transfer your number and info to the new phone. At the same time, your old phone will no longer have any cell access, even though the old SIM is still in the phone.
I ended up having to reseat the SIM in my 3G S in order for the number transfer to take place, not sure why it was taking so long to complete, but that finished the process.
The 3G S has a sim card in it, so AT&T will transfer your number and info to the new phone. At the same time, your old phone will no longer have any cell access, even though the old SIM is still in the phone.
I ended up having to reseat the SIM in my 3G S in order for the number transfer to take place, not sure why it was taking so long to complete, but that finished the process.
it shouldnt. every other phone ive had thats what ive always done. put in the sim card from my previous phone.
To be very clear, No positive or negative impact to using a current active AT&T SIM.
Dave
i was wondering too. I upgraded one of my lines but im swapping it to another line that wasn't eligible for the upgrade. So i guess I just pop the old sim card from that line and just hide the new sim card or what?
I dunno about the one that came with the original iPhone, but I have a much older SIM from my AT&T account that looks exactly the same with the 3G logo and such.
But for the 3GS I decided to go ahead and use the SIM that came with it, why not? Except now I'm probably going to be waiting all day for it to activate (while my old SIM is now inactive). Edit: as per instructions in this other thread, I restarted the phone and it activated immediately.
I want to be able to use my old 2G iPhone as a backup and for more adventurous outings such as camping. If I activate the new SIM in the 3G S can I move it to the old iPhone and have it work in both phones without reactivating in between? I would think if I just moved the old SIM to the new phone both would be able to use the same SIM without hassle.
Well when I got my 3G I just plugged it into iTunes and it was good to go within minutes. I figured this was going to work the same way so after about 10 minutes I assumed it was a defective SIM and put my old one in. It's been working a treat all day (except when I hard reset and had to plug into iTunes to unlock it again).
I don't think the SIM has anything to do with 2G or 3G. I think the SIM is just a serial number that identifies who you are to AT&T. The actual phone just gets the ID number from the SIM and then uses that identification number everytime it contacts the network. If you take your SIM out and look at it, you should see the ID number on the SIM.
Figured I'd share this for what it's worth - I couldn't get my new iPhone SIM card going, and used my old 1st gen SIM card which worked fine. But, I wasn't sure that this was going to work for the long haul... so I called AT&T and got someone on the phone who said it would be best to use the new SIM card (she said, FWIW again, that the old 2G card would probably hinder the performance of the phone) - so she got my new IMEI and new SIM # and when she was having trouble still, she realized she had to replace the old Data plan with the new 3G plan and that fixed it. One reboot later and I'm good to go. Just wanted to pass this along...
