EE is not going to change their CGNAT policy for consumers—it saves them millions of pounds in IPv4 addresses. Instead of fighting their network, bypass it. Spend £5 on a VPN, spend 15 minutes configuring it, and you will finally see that glorious “Open NAT” message on your console.
Since mobile hotspots do not provide access to traditional router settings like Port Forwarding
Unlike standard mobile phone SIMs, the Home Broadband plans often utilize different APN settings that allow for better port handling. More importantly, users on these plans have reported success in requesting a public IP address or having access to bridge mode, which effectively solves the NAT issue.
Ask to speak with Level 2 Technical Support . Do not waste time with first-line support.
Restart your phone and test your connection on your console. 2. Use a VPN to Bypass CGNAT