Does Deco x50 4G have whitelist option to allow internet access only specific device ?

Hi, Have a smarty sim installed in the router and I've updated it to the latest firmware but the speeds are so slow. I also put my personal ee sim into the router from my phone which gets 80mbs speed

Dear sir, I have inserted BSNL 4G sim in my android phone and getting internet speed around 40mbps but when same SIM inserted in MR600 and getting speed upto 22 mbps with selection of band 1 or in aut