bitoutofpractice As a teacher, you can't have your mobile switched on in the classroom, so it's off for the working day. It was the same when I worked in an office, and the same for Dh (HM Forces), especially in his last job when mobiles weren't allowed in the office for security reasons. You get used to using email or landlines, especially the former.
As I live abroad, it is cheaper for my elderly Mum to call my landline, as she gets free calls to Belgium, or those she makes exceeds the monthly charge made by TalkTalk, or email me, and the same for ds. I get free landline calls to the UK at certain times, so use those, rather than rack up mobile bills. Most of the communication for the stuff I do is by email or landline, or we meet for coffee to sort things out.
A mobile doesn't make my life easier....I have to remember to find it, charge it, and stick credit on it, as contracts in Belgium aren't cheap, and would be a waste of money as the monthly minutes wouldn't be used. I have to remember where my UK mobile is and charge it for when I travel back to the UK.
My mobile is for my convenience, as is yours I suspect. You wouldn't have one if it didn't work for you. As for not embracing technology....I use the bits I find useful, and don't use those those I don't. Why would I use something that doesn't enhance my life? As I said, technology is a tool. I use a Kindle when travelling, but prefer the feel of a book.
As for only contacting me when it suits me, yes. If I'm swimming, or doing yoga, or on a ferry mid Channel, or teaching, or in a meeting, or the cinema, or seeing friends, the phone is either off, or I mute it, or can't use it, if driving. Those who matter know where I will be, and will have called me earlier, or later.