If send massage to wrong number, next massage don’t be send to correct recipient and in /var/log/gammu/smsd.log log file always be appear lines:
Sat 2018/06/16 19:30:10 gammu-smsd[15456]: SMS sent on device: "/dev/ttyUSB0" status=500, reference=-1
Sat 2018/06/16 19:30:10 gammu-smsd[15456]: Error getting send status of message: Unknown error. (UNKNOWN[27])
Sat 2018/06/16 19:31:11 gammu-smsd[15456]: Found 1 sms to "+7516814654897" with text "aaaa @admin" cod 3 lgt 11 udh: t 1 l 0 dlr: 1 fls: -1
Sat 2018/06/16 19:31:11 gammu-smsd[15456]: New message to send: OUTA20180616_142027_00_+7516814654897_32100011100010.txtd
Sat 2018/06/16 19:31:41 gammu-smsd[15456]: SMS sent on device: "/dev/ttyUSB0" status=500, reference=-1
Sat 2018/06/16 19:31:41 gammu-smsd[15456]: Error getting send status of message: Unknown error. (UNKNOWN[27])
Sat 2018/06/16 19:32:42 gammu-smsd[15456]: Found 1 sms to "+7516814654897" with text "aaaa @admin" cod 3 lgt 11 udh: t 1 l 0 dlr: 1 fls: -1
Sat 2018/06/16 19:32:42 gammu-smsd[15456]: New message to send: OUTA20180616_142027_00_+7516814654897_32100011100010.txtd
Sat 2018/06/16 19:33:12 gammu-smsd[15456]: SMS sent on device: "/dev/ttyUSB0" status=500, reference=-1
Sat 2018/06/16 19:33:12 gammu-smsd[15456]: Error getting send status of message: Unknown error. (UNKNOWN[27])
Sat 2018/06/16 19:34:12 gammu-smsd[15456]: Found 1 sms to "+7516814654897" with text "aaaa @admin" cod 3 lgt 11 udh: t 1 l 0 dlr: 1 fls: -1
Sat 2018/06/16 19:34:12 gammu-smsd[15456]: New message to send: OUTA20180616_142027_00_+7516814654897_32100011100010.txtd
Sat 2018/06/16 19:34:39 gammu-smsd[15456]: SMS sent on device: "/dev/ttyUSB0" status=500, reference=-1
Sat 2018/06/16 19:34:39 gammu-smsd[15456]: Error getting send status of message: Unknown error. (UNKNOWN[27])
Please help me, how solve this problem? Thanks