3 ms·How are you so certain that this doesn't happen in general?by BubRoss 7y agoHow are you so certain that this doesn't happen in general?Ajedi32 7y agoIs there any evidence suggesting that it does? Personally I have no idea whether or not this is a common practice, though I have to agree with xorcist that it's certainly not a given.BubRoss 7y agoIt is common for AT&T