What does it mean to follow someone on Twitter?
Following someone simply means receiving their Twitter updates. How you receive the updates (on your phone, IM, or just on the web) is up to you. You can set your following preferences based on device, and then set notification preferences for each person you follow. Your followers are those who have elected to receive your twitters.
To follow means to receive Twitter updates. If you follow someone, you elect to receive their Twitter messages. When you’re getting someone else’s Twitter updates, you’re following them. People who are getting your updates are your followers. Can I use the same phone number on multiple accounts? No. You can only use one phone number or IM address for one account. Can I update Twitter from my phone but not receive other people’s updates? Yes. As long as you’ve verified your phone, you can send updates to Twitter even if all notifications are off. Make sure to set your updates to OFF on the web, or send OFF from your phone. People using +44 7624 801423 will always be able to send messages, but will not be able to receive them.