Iphone no longer connects/tethers hotspot?

Ihave an Iphone 3 that is no longer in service under any mobile contract, (it was with AT&T a few years back). I also have an android phone that IS in service. I've been tethering the android phone, or turning on the hotspot, and connecting to the internet on the iphone with no problems until about a couple of weeks ago. The iphone shows the Android's mobile hotspot, the excellent signal strength, and the attempt to connect but never connects. What happened? And how doI fix this?

Try making your device forget the mobile hotspot and try reconnecting.

hope that helps!

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