you can do these things, but there's enough friction that you won't do it unless you have a good reason

As truculent noted, the friction involved in doing any of those things is pretty much enough to just not do anything at all. Aside from sending SMS messages (or I guess, WhatsApp messages, once you manage to actually login to WhatsApp), the whole process is so painful, it reminds me why I haven't owned a T9 phone since the Motorola Razr -- and why I ultimately moved from that device to a BlackBerry (and then to an iPhone). I genuinely have no idea how I used to send so many text messages in high school and college.