Facebook via Text Message and Twitter mobile?

[Yoga-Pilates-Runner]

If i use Facebook via Text Message, will i get charged for internet services on my phone? or does it just send and recieve texts so i can update my status?
Twitter: will i get charged for internet services or does twitter just send simple texts, and i can tweet by sending a text to my twitter?

[Justfornow]

You're like the 100th person to ask this in the last 5 minutes. Congrats! Facebook is down! It's not like the world is coming to an end....

[ace.]

I'm pretty sure any text you recieve is gonna go to your bill.

[Omar]

lame

[Roslyn]

You will not be charged for the Facebook mobile thing. I have it on my phone.. the only downside is, I have about 500 friends and they like to comment, so I end up with about 60+ texts from Facebook. I'm not sure about Twitter though. I've never had experience with it, but I can bet that its the same as Facebook Mobile.

[Jeff]

You should be asking your phone company, not us.