@Gheppo Thanks for your valued reply, and glad to hear that your connection has been improved. You can leave it as it is for now and check the performance, any further problems, just let us know.

@JavoGEVP What is the light status of the RE200? Please ensure that you use the main router's wifi password to configure the RE200. With computer connected to the RE200 directly, please click here...

@FM1h Once it was shutdown due to the low battery, it can be powered on as long as the power supply plugged into the USB port. While to make it work, like connect to its wifi network, we need press...

@aismike The M7350 cannot run without the internal battery; There is an USB cable included on the package, you can use a charger to to power it on. The charger will adjust the voltage automatically...

@Router.1 Is the sim card detected by the M7350? If it was deteced but no IP address, you can try to create the profile manually. Or you can follow the instruction below to do some troubleshooting....

@grt You can try to degrade the firmware to have a try. The firmware which is older than the current one is optional. https://www.tp-link.com/support/download/tl-mr6400/#Firmware If still the same,...