I'm working in Spain (Europe) and the devive is working very well. Last week I was in Germany (Munich) and the device cannot work.

The version of the firmware is V4.

The SIM card is working because I received SMS messages in the M7350 and I put the SIM card in a mobile phone and I can make and receive phone calls.

When I tried to choose to other ISP provider I could change but the data connection not works. I reset the devices several times, I disconnected and connect the data roaming several times, ...

Please could you help me?

I also download the last version (V5) with my computer and when I tried to load in the M7350 device but when the download in the device is 26% I received the message "Update failed. The update file may be damaged."