Looking for the right smart phone



Hey everyone,

I will have to go through the hard and difficult process of buying a mobile phone once again very soon
As I haven’t really cared about this topic since I got my last one years ago, I’m going to need your help on this one.

I’ve been looking around quite a bit now and can’t seem to find what’s right for me.
What I want is a smart phone which operates on a more or less open system. I don’t want to be forced to use any specific software or email account. I’d like to sync everything with my beloved Thunderbird and Lightning, while I know I might have to take a detour for that to be possible.

Apart from that I’m quite open. The design or whether it’s using a touch screen or not are not really important to me.

I’d be happy to hear your suggestions!