Some things are still smarter than others.
Before the appearance of the iPhone, regular cellphones had always been consumer-friendly enough so that no maker would ever consider not having an instantly user-replacable battery.
Any further migration toward the anti-reuse/anti-recycling approach so strongly embraced in digital tech by companies like Microsoft would have been immediately rejected.
A battery without user access would be recognized as disposable electronics by design.
People knew that something like that would be a stupid phone, certainly not a smart one.
What made a smart phone smart at the time was its PC-compatibiliy, with regular removable user storage like memory sticks which you can pull out of the phone and plug into your PC to read & write directly. So there was functionally no limit to the internal storage to begin with. And advanced free PC software to owners so they could interface to the phone through its often-unique USB cable or alternatively by Bluetooth, or even earlier IR.
The phone couldn't actually be used as a hotspot itself, but it would get one PC on the internet and the PC could do the rest.
And that was everywhere you could get a simple cell signal, before data plans existed and for years while less-smart phones dependent on data plans were still waiting for the data roll-out nationwide to reach their neck of the woods.