So disappointed in my MR5200 :(

I recently got the MR5200 with a unlimited SMARTY sim in the uk.

My iphone 12 gets full signal 5g in my house, this router doesn't get 5g at all... To make things worse the 4g connection is slower than my £40 Tenda 4g router.

I did manage to get it to connect to 5g using DC unlocker and selecting the bands I wanted.. But its not stable and randomly drops out so I know the issue isnt with SMARTY.