Send a text message to a classmate who is studying abroad. Can he receive it?

Hello, I can receive it. First, you need to know the phone number of the other party. Secondly, you must dial the+sign and the area code of the other country before the phone number. China's is +86. If I send a message abroad to China, it is +86, and then my mobile phone number will be fine. If it's convenient, you can tell me the country you want to send, and I can help you check the area code. Each SMS costs 2-3 RMB, and the other party does not need to open GSM service. You are the sender.