I use a data-only cell plan ("tablet" plan from Fido), $15/month for 3 GB.

For voice calls, I use a SIP account from voip.ms, which mostly goes to voicemail (SIP kind of drains cellphone battery). I rarely use voice, and people usually text because calling, and most use Signal/Whatsapp anyway. The voip.ms account is also useful for doing SMS, and associating apps with it (such as Signal/WhatsApp).