MR100 won’t connect to my Orbi

Thanks for your suggestion about placing a device downstream from the modem but before the router.  When I did this I could get internet.  I then hooked it back up to the orbi - no internet.  I opened the settings on the orbi and where it was set to ppoe it had the box checked for "password required" (this was needed for my dsl modem - it was no longer needed for the cellular modem).  I unchecked the box and everything worked.  Thanks for your suggestion.  I would have never looked at the orbi if you had not have suggested that.

John