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.
In the 15 years I’ve had a mobile phone I have changed around 5 times. But the last one was just an upgrade that added 40 GB of data while roaming in the EU, US and Canada to my previous unlimited plan for Switzerland only. That increased the cost from 20 to 25 Swiss Franks per month.