Wifi Speed test

Have you tried direct hook up to the Orbi router to test? Do you have another PC, preferably a different brand, you can connect through wifi to see if the issue is with the particular PC and its configuation? Some PC manufacturers put apps and additional firewall protocols that can affect your devices response (sometimes these screw up like Dell SmartByte), and need trouble shooting or backing them out to fix. Normally you would expect that if your mobile devices are getting close to your ISP contracted speed, the issue lines within the device configuation and/or apps. I have had similar problems with guests whose PC notebooks just did not like Orbi very much and that turned out to be configuations in their PC's that were supposed to be managing priorities, but somehow were losing their little app minds connected to my system..