@Karim-Souman I suggest you read the previous two pages of this thread that give descriptions of how to fix the issue.

My tether app was fully up to date on a brand new, newest model iPhone, that goose chase told me it is garbage and multiple others have confirmed. Hence why I removed it. Problem solved. I will not...

You need to know what Version it is, indicated by a V and a number on the back, otherwise, impossible to answer the question for you. you can check the TP-Link download page for your country to see...

@XYZZ123 I got this problem fixed on the 450 v2 (the same issue seems to happen on multiple extender models, so I'm posting this in the off chance it is the same for this one). Same iOS weak signal...

@Smells You're welcome, and I agree, they should at least pull the app from the App Store if they aren't going to fix it. Would save a whole lot of people a lot of hassle. Funny mine isn't marked...

@ColinGC you're welcome