Some of my contacts didn receive my text message (sms) why?
A. Your friend may not have text messaging enabled. This is something that is very common within the U.S. To enable text messaging, your friend must contact their mobile network operator. Your friend may have a pre-paid mobile account, and the balance is too low. Some wireless carriers have their own standard such as: Text messaging plans, allowing a certain number of incoming/outgoing messages. The mobile device is “out-of-range,” Memory capacity has been exceeded, Subscriber ‘busy’ for short messaging. The mobile number you entered is incorrect. Make sure you enter the entire mobile phone number: do not enter symbols like “-“, “+” or “( )” If there is a leading zero (0) in the mobile number, remove it. And other technical factors may occur on peak time.