After the latest firmware update the deco continue to display Abnormal WAN Port speed and the download & upload speeds are capped at 94 Mbps. How can I at least downgrade to fix this issue? ISP suppor

Hi guys, Just about to buy the Archer MR600 V2 but have read a couple of feedback comments about problems connecting to Three UK 4g network. Are these just isolated problems or does this router have a