I feel like every two years I need to call my carrier and complain if I want a decent deal. They will do things like upgrade my plan on their website to have 10 extra gigabytes of data but won’t upgrade me to it until I contact them. There’s also all the new member exclusive deals that I feel make it impractical to just sit on one plan for an extended period of time.
Often, once a year or so. It’s the only reliable way to get a lower price plan where I live. If I were to stay on the same plan I was on a couple years ago I would be paying an extra 20-30$ a month in fees for less data.