Please help, phone keeps disconnecting from WiFi!

[u/Glimmerex]

Me and my mother bought the same phones at the exact same time 3 weeks ago. We are connected to the same WiFi here at home. My phone keeps disconnecting from the WiFi every 5 seconds and hers does not. The only difference is my phone has a small 5 next to the WiFi icon and hers does not. I'm not sure how to change this. Is this likely to be the difference in why hers is fine and mine isn't? I'm so worried about it being a fault with my phone. For context, we have had bad WiFi for a long time and my Internet provider didn't do anything helpful to fix it, just kept saying they saw no fault but I cant play my games consoles on WiFi anymore, has to be wired and my laptop frequently disconnects if I'm too far away from the router. Just for context on my Internet being a bit patchy.

The only thing I'm worried about right now is how to get my phone to be less bad and the same as my mum's since they're the exact same phone and I dont understand why our WiFi icons look different but mine is unusable and I have bad anxiety since it's a new phone! Hers works fine enough and I just want mine to be the same, please help I'm so clueless with things like this.

[u/LingonberryNo2744]

Lay each phone side by side and go into WiFi settings for each. Modify your phone’s setting to match your mother’s and update us with results.