Answer:
The USB port needs to be clear to function correctly.
An SMS is a short code that is used by businesses to opt in consumers to their SMS programs, and then used to send text message coupons, offers, promotions to those customers that had previously opted.
Explanation:
When Someone tries to call you, the tower sends your phone a message over the control channel that tells your phone to play its ringtone. The tower gives your phone a pair of voice channel frequencies to use for the call.
The MMS and other data driven services works on the fundamental voice network and is based on the big three GSM, CDMA and TDMA network technologies. The SMS allows text messages of 160 characters (letters, numbers and symbols).
The text messaging is an act of composing and sending electronic messages consist of alphabetic and numeric character between two or more more mobile devices.