I have been using 5 rpi 3 b+ on Raspberry pi OS, it works well but I have observed that the network drops after a day operation and network stays are disconnected till rpi is restarted to establish the connection back. Like to know what I am doing wrong and how can we have a stable connection that can work like mobile and stay connected always.
"Like to know what I am doing wrong..."
Yes, I'm sure you would. Let's see - I'm having a little difficulty picking up the tell-tale signals that emanate from RPi all over the world. You know - the signals that are broadcast world wide - the ones that are tagged @Ahijit's RPi 3B+#1, #2, #3, #4 & #5. Maybe you could increase the gain on the frobotigizer?/var/log
that might give a hint what is going on?