system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why will my phone disconnect from my own personal 4bar wifi and connect to an open 2 bar wifi without being prompted?
gpt
One thing to keep in mind...and this annoys the hell out of me...

The number of bars you have is indicative of how strong the SIGNAL strength to the router is - not necessarily how strong or fast the connection to the internet is.  You could be connected to a router that has one bar and will load faster than the router with 5 bars depending on internet speeds the respective router is connected to.