Hi, I have just got an S9 but found it only holds a single sim. Is it possible to change the holder for a hybrid one?
Unfortunately the phones software and hardware won't allow you to change from a single SIM to a hybrid duos type phone.
You'd need to return / sell that model and buy the specific model variant allowing two SIM cards.
Current Phone ~Samsung Note 20 Ultra 5G SM-N9860_256Gb SnapDragon 865+ Samsung One Ui 3.1/ Android 11.