Hey small problem, recently my tplink modem refused to detect any sim card (and yet it previously would) and any attempt to upgrade the firmware results into connection reset screen. What can I do?

Is it possible to restart or get status from Mr600 with a textmessage (sms) like text "restart" or "status"?

the setting for "record motion that lasts at least" with the slider resets to 1.0 seconds after: a power cycle, a wifi drop, and also just at random times to reproduce: drag slider to 2.0 seconds wait

For a week now, all my devices in the Kasa app are greyed out. They act like having no connection to the app, but some of them run on their schedules, others don´t. They are all upgraded to the latest

Dear sir/madam, I'm contacting you regarding a problem in my archer vr300 and the router DSL-downstream both min and max I'm currently having a 50 mega VDSL line and the max downstream keeps going up

Internet at 2.4 ghz frequency is very slow. How to upgrade from 2.4 ghz to 5ghz? I know there is no 5ghz on the modem. Can I do this by purchasing a device?