What OneMesh Powerline adapters works for archer mr600 in 4g mode?

Cant aggregate same bands The router supports same band aggregation or no 3+3 7+7 20+20 Greece ISP= Cosmote or in my area doesn't support aggregate same bands?

mr600 sms beta firmware cant see the char correctly ISP=Cosmote GR language text= greece MIXAΛHΣ ΤΟ COSMOTE MOBILE SECURITY ΠΟΥ ΕΧΕΤΕ ΕΝΕΡΓΟΠΟΙΗΣΕΙ ΣΑΣ ΠΡΟΣΤΑΤΕΥΕ

Hello, could you please explain how to eject SIM CARD from this router? There is no clue in documentation, nor on any search I made on internet... Really ashame.

Where is the update firmware to choose specific 4g bands and also on 4g+ bands το choose 2 bands together put this on first priority And in Network mode addnew 4G+ mode only pls