I will keep using a particular phone as long as it keeps serving whatever I want to use it for. As for me, I am not really moved by the latest sophisticated device out there in the market. And besides, I am not trend follower, I like to do my thing my own way. So, it's always in my best interest to ensure I don't deviate from what has been working for me over the years.
Additionally, I am not like those guys who are phone freaks, or those who want to impress their peers with the latest phone they have acquired that's the talk of the town.
More importantly, my phone is no bragging bright for me, but rather what enables me to perform the primary functions of what exactly a phone is designed for, which is to make calls, send/receive messages, surf the internet, and any other stuff it can assist me with to make my daily activities easy and effortless.