Ciao a tutti,
I don't know if english is allowed here, sorry if it isn't allowed. I came across this great forum topic after pages of google search, and I was looking for the Turkcell firmware for the MF286R(I have the Turkcell Superbox branded MF286R). Since I've installed T-Mobile.pl firmware (that I found on the turkish hardware forums) on the router, because Turkcell firmware was too restrictive, the router does not use carrier aggregation(LTE+, branded as 4.5G too). I am not sure if that's due to tmobile firmware or carrier aggregation wasn't a thing on the turkcell firmware as well, i dont really remember. I will reinstall the Turkcell firmware tonight to retry which you guys shared here.
Meanwhile if anyone has further experience about enabling carrier aggregation on this router, either with installing another firmware or some other way, let me know. Also if anyone wants me to try something with this router, I can do it as well.
I will definitely type back here after restoring to turkcell firmware(i might try couple of more firmwares as well.) Thanks for the great work you guys have done here