The E71 was a god tier device. Owned one for a good bit as a teen and it was the perfect phone for that time IMO. You could even WhatsApp on it until relatively recently.
It was slow and buggy, but it felt like a handheld computer.
Qtek rebranded to HTC and I bought a HTC Touch running Windows Mobile 6.0, I am not sure when or what I switched to afterwards, maybe an Android.