Yes you can if you are on a mexican sim card/network. It is possible to text if both are on the same us network but you need signal for that network.
You can, but it costs extra money from your account.
yes there is. i live round there.
From a cell phone, dial +1 at the start. From a landline, dial 001 at the start. For example: +1(XXX)-XXX-XXXX or 001(XXX)-XXX-XXXX
it will look like this 0========================>~ ({}) but for you 0==>~ ~<==0
Most people in the US have a cell phone.
The short answer is yes. You can buy a cell phone and use it in the US, or anywhere else in the world as long as the phone is unlocked. We have an article on how to Choose an International Mobile Phone for detials on this you can go to http://liferemotely.com/staying-connected/63-international-mobile-phone
Yes. If the messages are still available they can be subpoenaed. Even if they are deleted hey can still be accessed.
use your phone
No. As long as you are texting within the same country, the price will be the same.
Just like you would to any other place - by using the right telephone number. For instance if you're texting from the UK to a US phone, you need to use the US country code, and to drop the first zero in the cell phone prefix. If you're texting to a UK phone in the US, simply use the same number as if the phone was in the UK. The network jeeps track of where the phone is. Note that some contracts and prepaid phones might not allow international traffic.
Sometimes, not very. Text messages can be intercepted by certain wireless intercepting systems, but usually that stuff is advanced so only the Government has it. However, the Public can buy Bluetooth "sniffers," but that requires registering the device on your cell phone. So, whoever wanted to intercept, would have to use the cell phone first.
No - usually the mobile networks will do all the 'hard work' for you.