MR6400 4G/3G dropping out frequently, web pages time out
Bought this router 7 months ago and it's been working fine untill today.
I've bee using it with an unlimited data sim card from Smarty (Three network) its connected to my PC via ethernet cable and I have 3 wifi devices that also connect.
it was working fine untill out of the blue I found that quite often, but not always webpages wont load and any game I try to play is unable to connect to its server.
It seems every 2 or 3 mins the connection drops out and I'm unable to load a web page (webpage times out)
According to the router it reports it's still connected to 4g and has 75% signal during the drop outs.
Smarty sim works fine when I use it in a mobile phone. Even used my mobile as a USB tether to the PC with the Smarty SIM and internet connection would work fine on the PC, although the mobile can only get H+ signal whereas the MR6400 has an outdoor antenna so can receive 4g.
I've also tried my O2 SIM from my mobile in the router and it works fine on my PC and wifi devices.
It's just not happy when the smarty SIM is used in the router even though absolutely nothing has changed and it was all working fine untill today.