Nov 27, 2015 #1 A amintlk Member level 1 Joined Aug 23, 2010 Messages 36 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Location bojnourd Activity points 1,523 hi .. i used sim900a before and it work well .. but recently i use another sim900a again but when i send AT+CMGR=1 for sim900 to read the message detail it feedback me these +CMGR: 0,"",26 0791893905004100240C918939556271820000511172310320410748341A8D46A301 before that i received +CMTI: "SM",1 correctly ... when i send AT T it feedback me OK and when i calling the number it feedback me RING RING what's the problem? is it need upgrade?
hi .. i used sim900a before and it work well .. but recently i use another sim900a again but when i send AT+CMGR=1 for sim900 to read the message detail it feedback me these +CMGR: 0,"",26 0791893905004100240C918939556271820000511172310320410748341A8D46A301 before that i received +CMTI: "SM",1 correctly ... when i send AT T it feedback me OK and when i calling the number it feedback me RING RING what's the problem? is it need upgrade?
Nov 27, 2015 #2 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,413 Helped 14,749 Reputation 29,780 Reaction score 14,097 Trophy points 1,393 Location Bochum, Germany Activity points 298,069 You have apparently set the SMS mode to PDU. (+cmgf=0)