SMS count calculation
GSM encoding: 1 standard SMS message = up to 160 characters 2 concatenated SMS messages = up to 306 characters 3 concatenated SMS messages = up to 459 characters 4 concatenated SMS messages = up to 612 characters 5 concatenated SMS messages = up to 765 characters through to 9 concatenated SMS messages = up to 1,377 characters
UCS-2 encoding (2-byte Universal Character Set): 1 standard SMS message = up to 70 characters 2 concatenated SMS messages = up to 134 characters 3 concatenated SMS messages = up to 201 characters 4 concatenated SMS messages = up to 268 characters 5 concatenated SMS messages = up to 335 characters through to 9 concatenated SMS messages = up to 603 characters