Unfortuantely this is what I´ve already tried. It seems not the wlan connection is the problem but the connection from Router/SIM to Service provider. Any chance to get logfiles out of the device?

Model : Hardware Version : Firmware Version : ISP : For my vacation in France I´ve bought a M5250 3G Router and a prepaid 100go SIM Card from free.fr provider. So far everything is working except...