I've been doing hardware repair on computers, iPhones, and various other electronic devices professionally for nearly 15 years. In that time, very very few other connectors, internal or external, have proven to be more aggravating to deal with, or as consistently fragile as the Hirose U.FL.
These fuckers have been around since 1991 and much to my personal disgust, are still very commonly found in modern devices. They were designed to be space-saving and I'm sure in 1991 they were a godsend. The problem is that it's been 32 years and modern electronics have evolved in a lot of ways. The constant push to make notebook computers thinner and lighter alone has spawned a lot of innovations in internal wiring. Yet here we are still using a 32 old standard that is well known to break down after a handful of re-uses. Which brings me to the crux of my grievance:
They were not originally designed with reconnection in mind. In many devices, the cable is hard-wired on one end, so if the connector on the other end wears out after a couple times(and it will), tough shit you better be good at soldering. Furthermore, disconnecting the cable requires a fair amount of force, because the connector snaps on and holds pretty tight. Depending on the device in question, there's often minimal room to grip or pry to get it loose. If the solder holding the male end(the one on the board) is old and weakened, or just of lesser quality/subpar application, or if you're just unlucky, it's not uncommon for it to break off the board while trying to disconnect it. Again, hope you're good at soldering. I remind you that these have both been known frustrations since 1991. And we still use this, with no notable design improvements. Because reasons.
There have been multiple special tools specifically created for the purpose of disconnecting and reconnecting these and only these to reduce the chance of breaking them. That is how bad they are.