Any tri-band cell phone will work. I'm using the LG KS360 which is nice for text messaging:
http://www.gsmarena.com/lg_ks360-2467.php
If you're not sure whether your phone will work in a country simply use this site:
http://www.gsmworld.com/roaming/gsminfo/index.shtml
For Colombia the system is simple: those who make the call or send the text message gets charged. You can receive calls/messages for free. As a result, girls almost always answer their phone. The three companies are Movistar, Comcel, and Tigo. Comcel seems to be the most popular so it would be a good idea to go with them as you can get discounted calls with other people using the same service. To get good discounts, simply recharge your phone on days they have a "triple" promotion, where you get 3x what you put in.
Brazil is a little more confusing. I've used Claro and TIM (another company is Vivo), and I'm pretty sure you can charged to send AND receive. As you can imagine this is ridiculously expensive and one long phone call with a girl can cost something like 5 dollars. But each company has "promotional" minutes and sometimes I make calls that are free, though I don't know why. It's like playing the lottery. If you have TIM you can check your balance real quick by putting in *222# then send.
In Argentina I used Movistar but don't remember their charging structure.
One thing about South America is that there can be a huge delay with text messages. I would say about 3% of my text messages take several hours to get to the recipient. The other week I was with a girl and her phone beep beeps with a text message I sent to her five hour before.
http://www.gsmarena.com/lg_ks360-2467.php
If you're not sure whether your phone will work in a country simply use this site:
http://www.gsmworld.com/roaming/gsminfo/index.shtml
For Colombia the system is simple: those who make the call or send the text message gets charged. You can receive calls/messages for free. As a result, girls almost always answer their phone. The three companies are Movistar, Comcel, and Tigo. Comcel seems to be the most popular so it would be a good idea to go with them as you can get discounted calls with other people using the same service. To get good discounts, simply recharge your phone on days they have a "triple" promotion, where you get 3x what you put in.
Brazil is a little more confusing. I've used Claro and TIM (another company is Vivo), and I'm pretty sure you can charged to send AND receive. As you can imagine this is ridiculously expensive and one long phone call with a girl can cost something like 5 dollars. But each company has "promotional" minutes and sometimes I make calls that are free, though I don't know why. It's like playing the lottery. If you have TIM you can check your balance real quick by putting in *222# then send.
In Argentina I used Movistar but don't remember their charging structure.
One thing about South America is that there can be a huge delay with text messages. I would say about 3% of my text messages take several hours to get to the recipient. The other week I was with a girl and her phone beep beeps with a text message I sent to her five hour before.
Roosh
http://www.rooshv.com