Guest network not working on the RBR50 + RBW30 mesh system and 2.4Ghz network issue.

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I had the Orbi mesh system that includes the RBR50 router and 2 satellite RBW30 about 2 months.  I've upgraded to the firmware version 2.5.1.8.  I have couple IOT devices (Nest Yale X Lock, Nest thermostat) that only connect to the 2.4Ghz and every couple days, they go offline so I have to reboot the Orbi system couple times to get the devices to be online again.

 

Another issue that I have since day 1 was that the Guest Network never works. aboutpetguide  I can connect to it but couldn't get to the internet.  

 

Anyone having the same issues?  And suggestions?

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I am having the same issue, did you resolve it.