Prepaid Mobiles

How to connect head phones to mobile phone and computer simeltaniously? So someone can attend phone call using head phone while the head phones connected to computer for listening music. Is there some connector to use?

I already have a t-mobile phone and plan, if i were to get one of those free phones: a) would it be free b) could i still have the same plan????

I have 2 phones, just wondering if i could switch the phone i want to use now and then.

does anyone know how the verizon wireless prepaid cards work, and how you get the minutes, because all they say is like $30 and $15 and they dont tell how many minutes that you get. soooo can you exlain how to use them and stuff? THANKS BUNCHES!

I used to have Tracfone but I just switched to Virgin Mobile. I can’t figured out which is cheaper but I think Tracfone is. Either way my Virgin Mobile phone is MUCH better but Tracfone had better service. I’d rather just have a phone with a real plan but I just turned 18 so I have no credit and my parents won’t help me out with it… What is better? Any opinions?
For example with my Tracfone I could buy a card with 60 units on it and lose .3 every text and for the same price I can buy a Virgin Mobile card (it says it has 200 units on it) but it just comes up as $20 and takes off $.10 each text. I’m already down to $12!