How to open SMS on Samsung p4600 TV screen?

The envelope sign on the screen of Samsung TV connected to the set-top box is the unread email (information) prompt of the set-top box, including the reminder of renewal fee and the opening of new service. Since there are many models of set-top boxes, the following methods are for your reference:

Find the key of e-mail, e-mail, information, short message and menu on the remote control of the set-top box, press this key to enter the list, then use the arrow keys to select the subject of e-mail, read or delete the content, and press the exit key to exit the interface.

If the above methods can't solve the problem, please refer to the set-top box manual and contact the customer service of the set-top box manufacturer or the local signal department for consultation.