A text message invitation

I have a wrong in a comment because I wrote they haven't available and the correct is they aren't available

I prefer to send messages to my friends, sometimes they haven't available to speak.

I prefer to send text message to friends to make plans. Making plan usually takes time and there are a lots of changes during the process such as time, place, participants, activities, etc. With message, I and my friends can easily update the changes.

it depends on my situation, sometimes I have time and credit then I call to my friends, otherwise I prefer to msg him or her.

I prefer to speak with my friends by phone. but sometimes I send text messages to them.

I prefer to speak to my friend to make any plan or just talk. But if I need to make a plan with someone who I don't know much, I would send a text message first for his/her consideration and make a call.

I always prefer to send text messages if I am contacting an English speaker friend. I have more time to think and I can review my text before sending and correct it if there is any mistake.

I depends. I prefer send text of messages by phone but not too much, however I sometimes call because is the fastest way to communicate.

I think there is a mistake in Task 1 ! . There is nothing about having drink in the chat! so the answer of "They are going to have a drink" should be false.