Aporte original por: senata shaha ,
This is not a issue with your iphone. This is a issue of network problem or outgoing and incoming msg server of your your gsm or cdma network. Sometimes it called call drop. Try to use your sim other mobile and check whether problem is still there or not. Dont need to check antena. First check that your sim network is fine with other mobile. Also called to customer care and ask from msg server number and manually change to your mobile.