WiFi is really slow on iPhone 7plus. Videos keep stopping. Phone shows full signal. Connect app says someone else is logged into settings. Can’t use the app to test connection as nothing happens when I click the three little circles. Have re installed app 2 days and it let me run the test and everything was ok. App keeps highlighting my booster with an issue and is trying to make it the same name as my network but when I try to do this is keeps saying it can’t find the booster???