GL-X3000
Module: EM160R-GL (LTE version)
on Version4.0 Firmware Type release50402
unable to send sms, gui stuck at trying to send (dots moving in circle) . only after a while, it becomes triangle with ! sign.
also noticed its unable to received SMS, when its stuck trying to send (dots moving in circle).
its only able to receive SMS when it stop trying to send (error with the triangle with ! sign).
occasionally when gui is stuck at trying to send (dots moving in circle), a gui refresh will show no modem device found even though there is still internet connection via lte.
BTW: the SIM is on the 1nce network, via Vodefone Greece. It is not possible to send SMS messages to it over the public network. So if you need an incoming test message then let me know.