Also clean the tip on a brass wool ball rather than a wet sponge. The sponge cools the tip every time and makes everything slower.
For the data problem specifically, stop using your home plan for hotspot. A local eSIM data package is usually cheap, often ten to twenty for 20 or 30GB for a month, and it is bought in three minutes at the airport gate. I now treat hotel wifi as the backup and the eSIM as the primary for calls, which is the opposite of how I started.
Also disable your laptop wifi power saving. On a couple of machines it parks the radio between packets and produces exactly this stutter pattern.
Also check the gasket socks or pads are all actually compressed evenly. One that has slipped leaves the plate floating on that side and you get a localised ring.
Two card networks is the detail people miss. Whole countries and whole terminal fleets will only take one of them, and that is not a fraud problem you can phone your way out of.
The eight encounters number is oddly motivating. It makes it a countable thing rather than a vibe.
Tweezer test confirms nothing in the row responds. One socket on the bottom left is visibly tilted. Time to borrow an iron.
Doing this also cured me of believing I type at a constant speed. The intervals in a fast roll were about half what I assumed.
The half charge thing surprised people for years but it is the same reason laptops have a charge limit setting now. Full and warm is the bad combination.
Modern versions are lazier than they used to be, which is why the step is much faster than it was five years ago. Instead of fully compiling everything on day one, phones increasingly compile the parts you actually use, based on watching how you use each app. So the count going up quickly is not it skipping work, it is it deferring the work you may never need.
The everyday version: it is translating a book into your language once and keeping the translation, instead of translating each page every time you read it.