Can GSM users send overseas short messages?

Sending information requires you to turn on the international roaming function.

+8613900 * * * is required when sending information.

Need to remind you that (Japan, South Korea, some countries) need to go through the formalities of renting a plane, because the network is different, China's GSM network mobile phone can not be used. At this time, you will be given a mobile phone with a Japanese and Korean number, instead of your mobile phone roaming there. Just transfer the mobile phone to that number, and be sure to add +86 when sending information. But you can't receive the mobile phone information sent to your domestic global communication.

Please contact 10086 for more questions.