I'm still using my 2009 Nexus One. It is painfully slow, and won't run any modern apps, and I've tried to find a suitable replacement several times but it seem

I'm still using my 2009 Nexus One. It is painfully slow, and won't run any modern apps, and I've tried to find a suitable replacement several times but it seems a shame to throw away a perfectly good phone and I just haven't found anything that is of comparable size and build quality without having to sacrifice screen resolution, FM radio, removable battery or microSD slot.