https://community.three.co.uk/t5/Broadband/3internet-APN-problems/m-p/64635#M10282 <P>There has been a lot of threads all over the forum regarding the '3internet' APN not working correctly. I wanted to compile a list of problems that customers have seen from it not working correctly.&nbsp; The main issue seems to be that when a router is configured to use the '3internet' APN is assigned a private IP address instead of the public IP it is supposed to assign.&nbsp; This leads to problems as the internet connection is being NAT'ed (using Carrier Grade Network Address Translation - CG-NAT) and the shared public IP seems to change very rapidly.&nbsp; The following is a list of problems people have reported, please add your experiences if you have noticed different:</P><P>- Router is fire-walled from the internet and can't receive incoming traffic/connections, leaving no way to port forward or DMZ local network devices.</P><P>- Voice over Internet (VoIP) services don't work properly, Sipgate in my case</P><P>- Cloud services like Dropbox, CCTV, solar, inverters, car chargers, etc don't work correctly</P><P>- Notifications on Android phones (connecting via the WiFi) are delayed and in some cases blocked</P><P>- Online banking (Santander in my case) won't let me stay logged in&nbsp;</P><P>- distributed/cloud type apps like Telegram, Signal, etc have constant connection problems</P><P>- online games report strict NAT'ed connection or just fail to connect to servers</P> Sun, 09 Nov 2025 00:12:43 GMT Anonymous 2025-11-09T00:12:43Z https://community.three.co.uk/t5/Broadband/3internet-APN-problems/m-p/64635#M10282 <P>There has been a lot of threads all over the forum regarding the '3internet' APN not working correctly. I wanted to compile a list of problems that customers have seen from it not working correctly.&nbsp; The main issue seems to be that when a router is configured to use the '3internet' APN is assigned a private IP address instead of the public IP it is supposed to assign.&nbsp; This leads to problems as the internet connection is being NAT'ed (using Carrier Grade Network Address Translation - CG-NAT) and the shared public IP seems to change very rapidly.&nbsp; The following is a list of problems people have reported, please add your experiences if you have noticed different:</P><P>- Router is fire-walled from the internet and can't receive incoming traffic/connections, leaving no way to port forward or DMZ local network devices.</P><P>- Voice over Internet (VoIP) services don't work properly, Sipgate in my case</P><P>- Cloud services like Dropbox, CCTV, solar, inverters, car chargers, etc don't work correctly</P><P>- Notifications on Android phones (connecting via the WiFi) are delayed and in some cases blocked</P><P>- Online banking (Santander in my case) won't let me stay logged in&nbsp;</P><P>- distributed/cloud type apps like Telegram, Signal, etc have constant connection problems</P><P>- online games report strict NAT'ed connection or just fail to connect to servers</P> Sun, 09 Nov 2025 00:12:43 GMT https://community.three.co.uk/t5/Broadband/3internet-APN-problems/m-p/64635#M10282 Anonymous 2025-11-09T00:12:43Z https://community.three.co.uk/t5/Broadband/3internet-APN-problems/m-p/65567#M10427 <P>Connecting to Pulsesecure VPN also a major issue seemingly unresolved</P> Wed, 10 Dec 2025 19:50:59 GMT https://community.three.co.uk/t5/Broadband/3internet-APN-problems/m-p/65567#M10427 User123 2025-12-10T19:50:59Z