What are you trying to do exactly? My best guess is you are trying to access settings on the home phone 2 but the app is failing. In that case, if you have a computer I would try using the web utility instead of the app on your phone. You can use the...
Here are some ideas:Does your bandwidth match up with your usage? How old is your router? and How many devices are attached to it?Is your router firmware uptodate?Are you operating behind a firewall or using a VPN?
That should only be a problem if two routers are broadcasting too close to each other on the same frequency. Since they are being broadcast by one router it shouldn't make a difference. You could always test it out. It's not difficult to turn on and...
Are you planning on replacing the ZTE with the B612? Then plan to connect it to an ASUS router? Is your internet connection going to be a cellular signal?
If you add a $10 top-up today the expiry date will stay at May 9, 2019. The date doesn't roll back if you add a smaller amount with a shorter time frame.