Public IP (IPv4/IPv6) with "O2 Free Pro Unlimited Max" SIM in a 5G Router for Server?

Hello O2 Community,

I am a business user (Selbständiger) and I am considering getting a second, dedicated "O2 Free Pro Unlimited Max Online" SIM card specifically for use in a 5G/LTE router (Zyxel FWA710) to provide the main internet connection for my office.

For my work, I run a small server, and it is essential that I can open specific ports (port forwarding) to allow incoming connections. Before I purchase this new SIM, I need to be 100% sure this is feasible.

To do this, I obviously need a publicly routable IPv4 address. I understand that by default, most mobile plans use CG-NAT, which blocks this.

My specific questions are:

1. Is it possible to get a public IPv4 address on the "O2 Free Pro Unlimited Max Online" mobile tariff?

2. If yes, what is the exact procedure to activate this? (e.g., Is it a specific APN, a "Zusatzoption" I need to book, or do I need to call the business support?)

3. What are the monthly costs for this public IP add-on?

I am asking about this mobile solution because I am struggling with the fixed-line options at my address.

When I check the O2 website for fixed-line internet (O2 Home), the only option available is the "O2 HomeSpot (LTE/5G)" solution. This is very confusing because I know for a fact that a full FTTH (fiber optic) installation is physically present in the building (the previous tenant had a fiber connection).

So, my main goal is to get a speedy and stable connection with a public IP. Is my best path to add this feature to a new "Pro" mobile plan, or can someone from the O2 team please help me find the "hidden" FTTH option that the website is not showing for my address?

Thank you for any help or clarification you can provide.

Best regards,

Alberto
Edit o2_Bianca 13.11.25 08:42Uhr: Moved from Mobilfunk zu Hause & HomeSpot to English o2 Community mobile