Does Internet Price Go Up If You No Longer Have A Cell Phone?

From all the pricing I’ve seen, you definitely get a substantial discount if you have >1 service.

Getting by without basic texting/mobile-access is quite difficult these days, IME, you need a way to get 2FA texts for some things and a way to run a MFA Authenticator app for others.  You can use a security key (such as a Yubi key, one example) but the support is still somewhat limited, at this point.  You can run Authentication apps on most tablet devices, using home internet data, certainly, but again support is limited and sometimes requires a text to configure, or as a fallback.

Not having 2FA of some sort on your “critical” stuff, such as email, mobile-account, financials, and a few others is pretty sketchy; if someone compromises it (which is almost a “when instead of if” at this point, if you have a simple credential for login), not only will you lose control of that account and whatever’s associated with it, but you’ll have a VERY difficult time regaining control.

I’d suggest just getting a low-cost prepaid plan or something and combining that with Home Internet, simple, cheap, and covers all the bases.