@DonW55 I have problems with the mr550, which is the same as the mr500, but I still had more problems with the 6400

@Luz solar I have already bought a new one (MR 500) but I want to repair the MR6400, since it has the advantage that the 4g module is removable. Please, can you tell me which 4G module is compatible...

@marios239 I just bought an MR550 on Amazon, and it is actually a mr500 (mr500 appears on the configuration page)

@Sunshine Thanks, I have tried the new firmware, but it does the same: At first there is good coverage, but as time goes by, the coverage gets worse and in the end it is completely disconnected; I...

I have had this 4G LTE router since 2018 working continuously, but a few days ago the SIM card was disconnected from the network and until the router is restarted it does not work again (it works...

Thanks Kevin