I got a contract with Telus a while ago.
This is it:
http://www.telusmobility.com/en/ON/yourchoiceplans/yourchoice25.shtml
and I chose to go with my favourite 5 people option.

However, after using the phone, I am worried that texting others not included in my fav 5 will add up to be a lot more than I expected. I know I can change my 5 numbers each month, but I tend to text a lot of different people a little bit.
Am I stuck with this option? Or could I change it to 1,000 texts?