Thanks for the advice - really appreciated, however they are still not working sadly.
When you used the app, did you connect both speakers to the phone to then connect with the app and let them firmware upgrade? no, the method I found worked was to turn both speakers on, let them automatically pair, and then switch on bluetooth on my phone. Doing it this way, I only had to pair with the master speaker (blue power button, as opposed to white which is the slave). Only one speaker paired to my phone.
If you had done that then the slave speaker may be still connected to the phone along with the master and that is causing the issue. (not that then!)
TWS does not allow EQ settings (as I have read here, but I may be wrong) I found it was working fine, until they both suddenly switched off and one started buzzing loudly.
So what I’d do is very assuredly purge it all back to the original. Uninstall the app. Before doing this I checked the speakers by connecting them separately, the master speaker had up to date firmware, the slave needed an update, so I did that and then uninstalled the app.
Delete all pairings, on everything, turn bluetooth off. Reset each speaker. done, except ‘reset speaker’, I can only power them on and off right now, tried searching if there’s a hard reset button combo but not found anything on that.
Then pair only one of them to be the master. Following the TWS process you already know. Should now work. done, except they automatically paired with each other (I guess I would need to factory reset if I wanted them to forget the TWS pairing they have between each other). I have also just updated my android software for good measure.
Do not use the app with the speakers after you have used them one time only to check and do any firmware updates. not sure what you mean here? But after going through the process above, they are still doing it