I send the command DISPLAY TEXT to phone by using SMS-SUBMIT message. Why don't I get any text on my phone's screen?
details:
My SMS-SUBMIT message according to ETSI TS 23.048, I don't use any security capabilities (no KIC, KID, RC/CC/DS)
My DISPLAY TEXT command
D0 3F ; This is a proactive command of length 0x3f
81 03 01 21 81 ; The command is DISPLAY TEXT, high priority, wait for user
82 02 81 02 ; It was sent from the SIM to the display
8D 34 04 ; Encoding is 8-bit default SMS (ASCII), message:
48 65 6C 6C 6F 20 77 6F 72 6C 64 21 20 49 20 61 6D 20
; "Hello world! I am "
61 6E 20 61 6C 74 65 72 6E 61 74 69 76 65 20 53 49 4D
; "an alternative SIM"
20 54 6F 6F 6C 6B 69 74 20 73 74 61 63 6B 2E
; " Toolkit stack."
I merge SMS-SUBMIT and DISPLAY TEXT and send them on the SIM by SMS. But I don't get any text on the screen of tne mobile phone. Why?