We are talking about smartphone data plans, not actual data plans for your home internet. The unlimited you see is ONLY for phones like old flip phones & normal phones. Smartphones do NOT get included in this package.
Sorry about that. I was under the impression that as long as you gave the provider enough notice to go pay as you go you could use any kind of phone for it. Cause a long time ago I was on a contract with another provider and when the contract was nearly up we gave them the notice that we were switching to pay as you go and as long as we did it within a 15 days period we were allowed to use the same phone. Of course smart phones may differ cause at the time smart phones didn't even exist.