Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
You may somehow be able to get a contract with a cell provider to do such a thing, but I would imagine only large corporations with corporate accounts or various government services would normally be able to do so.
Most cell carriers implement Carrier Grade NAT (CG-NAT) for wireless devices, which is the 100.64.0.0/10 network. I've not heard of anyone having a static IP address on your cellphone, but business might be able to leverage a static IP address in locations where they use LTE connectivity to their routers via Cradlepoint or something else like that via a built in LTE modem, or external via USB.