Using the phone is sending the message as soon as possible, but there may be a problem with the language that the recipient may speak well or not, or if you want to send a message to the evidence.
Using your phone Messenger is the fastest. However, this may have a problem with the language. The recipient may speak poorly or do not exist. If you want proof that the message already.
การใช้โทรศัพท์เป็นวิธีส่งสารได้เร็วที่สุดแต่แต่วิธีนี้อาจมีปัญหาเกี่ยวกับภาษาซึ่งผู้รับอาจพูดภาษาได้ไม่ดีหรือไม่อยู่หรือถ้าท่านต้องการหลักฐานว่าส่งสารไปแล้วUsing the telephone as a way to send a message as soon as possible. But this method may have problems with the language. The recipient may speak the language well or not. Or if you want evidence that substance.