There is a design flaw in N900, not to have the microUSB-port fixed better to the motherboard or to the case. A push through component would had been better.

But I wonder, is there also a practical design flaw in choosing microUSB-B connector as an international standard charger inlet in mobile phones?

microUSB-B should tolerate more (10 000) connect-disconnect cycles than mini-B, but human errors make µUSB actually more vulnarable.

Clearly the connector is so small, and almost seem like symmetrial if you are in the dark, drunken or farsighted without glasses. But it is not symmetrical of course. Trying to insert µUSB-B connector in a wrong way and using little force, easly can break the connector in the device.

Maybe micro-USB connectors should had been designded to be half way symmetrical. Maybe not working upside down, but not breaking anything if the mistake is made.

I wonder how many of these broken ports are partly caused by once or couple of times trying to put the connector 180 degreess upside-down?

The situation may get easier (or not) with micro-USB3, because there is that indent on the other side. Yet, I think in the standard could require coloring (black/white) to indicate which side of the microUSB-B- and USB3-micro-B-male-connectors is the up.

btw, I recommend to use white paint to mark the upperside of the current charger's µUSB-B male connector. I've used white repair lacquer for this job on all of my microUSB-B male connectors.