Is it illegal to switch SIM cards between phones without advising the wireless phone company?

I have friends that do this all the time. I was just wondering if that was illegal or if they have to pay a fine every time they do it. Does the SIM card track your records and send it to the wireless phone company? It seems wierd!?
Categories: Phone Cards Tags: advising, between, cards, company, illegal, phone, Phones, switch, wireless, without
Will cell phone SIMS cards fit other brands of cell phones?

In other words, are cell phone SIMS cards interchangeable in different brands of phones?
I’m not so comfortable with Casey’s link.
Cell phones or phone cards for vacation in Vancouver, BC.?

I’m planning a week-long visit to Vancouver and would like to know what the best options are for communication. I haven’t traveled out of the country for some time and would appreciate any advice regarding cell phone plans or simply purchasing a phone card. Thanks in advance, John
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ZapTel Destination Cell phone card for calling overseas mobile phones
Categories: Phone Cards Tags: calling, Card, cell, Destination, Mobile, overseas, phone, Phones, ZapTel
Do phone cards work for prepaid cell phones?

I have a phone card, not sure what brand… if Minute Values is a brand, then that’s it. Will the time on this card work with my prepaid Virgin Mobile phone?
What are the name of phone cards people put in their cell phones in Lahore, Pakistan ?

I wanted to know the name of cell phone cards that people use in Lahore, Pakistan
How does the smart phone cards works with public phones? Do they connect with Internet while reducing units?

I would really appreciate if someone can tell me where can I find details about this process. I mean when you put the card which it contains a small chip; what is happening? Is the connection between only the card and the phone machine? is there any third part involved with counting unites? Anyway thanks in advance for your help to understand this.
Categories: Phone Cards Tags: cards, Connect, Internet, phone, Phones, Public, reducing, smart, they, units, works
can i use dollar tree phone cards for regular go phones?

well they sell pre paid calling cards or whatever you call them at the dollar tree and i was wondering if i can just use those instead of buying original ones from the phone store…sooo would that be able to work or not?
Do prepaid phone cards work for all phones?

I have a phone that’s not in service but i want it to be..but i don’t want a phone plan because i have to sign a contract for two years. Do prepaid phone cards only work with tracfones?
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