How do i text everyone at once on my sidekick?

well, i just got a new sim card, but not changing phones.

so how do i text everyone at once to give them my new number, instead of texting one at a timee it takes forever! hahah thankyou:)How do i text everyone at once on my sidekick?
When you are entering the number, once you enter it, use the comma (,) to enter another entry.