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-   -   8830, SIM Cards, & Numbers (http://www.blackberryforums.com/general-legacy-device-discussion/131021-8830-sim-cards-numbers.html)

trashjunkid 05-20-2008 11:17 PM

8830, SIM Cards, & Numbers
 
I have looked for the answer to the following elsewhere on this site and can't find it.

I recently went through Verizon and got my phone unlocked so I could use a SIM card from a different provider while overseas. While I was at it, I had them activate the default Vodaphone SIM (I plan on upgrading to the international dataplan while overseas).

Now, here's my question:
If I use a different SIM card, will my phone number change?

As I was going through the unlock & activation process, I asked the Verizon tech for some info. She stated, pretty directly, that in the case of the 8830 the phone number is tied to the phone, so even if I used a SIM card from, say, an Italian service provider, I could still be reached at my original phone number.

This confuses me a bit.

My understanding was that it worked the other way around- that is if I put my sim card in a different gsm unlocked phone, well the phone's number would be effectively changed to match the sim's number. And if my friend popped in their sim in the same phone, again it would be the friend's number that the phone would reflect.

So which is it? Is it the phone that houses the number? The sim card? Sometimes one, sometimes the other?

My intention is to get a sim card from a country-specific provider and use hat card with its lower rates for voice.

So... when I use the default vodaphone, my number will be the same as the number I use when at home- is that right?

And when I pop in that other sim card, the one from another service provider, what number will the phone answer to?

Finally, if anyone can lay out how sim card's work, practically speaking, please do so- or point me to a site that explains it simply, if you know of one.

Thanks in advance,

Trashjunkid

Ombus 05-21-2008 12:35 AM

Quote:

Originally Posted by trashjunkid (Post 938067)
If I use a different SIM card, will my phone number change?

Yes. Your phone number will be the one of your new SIM card.

Quote:

Originally Posted by trashjunkid (Post 938067)
As I was going through the unlock & activation process, I asked the Verizon tech for some info. She stated, pretty directly, that in the case of the 8830 the phone number is tied to the phone, so even if I used a SIM card from, say, an Italian service provider, I could still be reached at my original phone number.

While you're oversea, your phone would be roaming on the local provider's network. If it's a GSM network, then which ever SIM card you're using will take affect. If your US SIM card is in the phone, people calling your US number will ring you. Otherwise they properly can't find you. If it's a CDMA network, then it doesn't matter which SIM card is inside. You will be charged roaming for all calls.

Quote:

Originally Posted by trashjunkid (Post 938067)
So which is it? Is it the phone that houses the number? The sim card? Sometimes one, sometimes the other?

SIM card house the number for GSM network. The phone itself house the number for CDMA network. Since the 8830 can use both networks, it depends which network is active at the time.

Quote:

Originally Posted by trashjunkid (Post 938067)
So... when I use the default vodaphone, my number will be the same as the number I use when at home- is that right?

Yes.

Quote:

Originally Posted by trashjunkid (Post 938067)
And when I pop in that other sim card, the one from another service provider, what number will the phone answer to?

Under GSM, the sim card's #. Under CDMA, your US #.

Quote:

Originally Posted by trashjunkid (Post 938067)
Finally, if anyone can lay out how sim card's work, practically speaking, please do so- or point me to a site that explains it simply, if you know of one.

GSM - Wikipedia, the free encyclopedia

jepok22 05-22-2008 06:15 AM

is there a way to change the active phone number? my bb8830 came from the states given by my uncle and here in the Philippines i am using a different sim card and yet the old number is still on the phone.

is there a way to fix this?


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