Net10 is a subsidiary of TracFone, a major pre-paid company that has developed a hold on the market in both the US and in Mexico. Net 10 offers cheap and dependable phones at a price that is tough to beat. I think they may even be losing money on some phones when they initially sell them, in hopes that in time you will buy enough air time to warrant the initial loss. Net10 phones are widely available and actually use At&t's network of towers so you can be sure you will not have any loss of call quality when using the service. You can purchase Net10 airtime quite easily, but the easiest way is online, you simply select the amount of airtime you want, use one of our Net 10 Promo Codes to save if we have one for airtime, then just follow the basic instructions to add the airtime to your account.