(adsbygoogle = window.adsbygoogle || []).push({}); hello there , i wanted to know , i used an app on my iphone its called uber , they are a cab/taxi company that is really good search them up
basically i had a method to get free cab rides
and they noticed after a week

i realised that my account was blocked on my iphone
and if i made a new account and logged in with my iphone the account was blocked aswell

so i wanted to know how the app knows its my iphone?
is there a certain code my iphone has or does it use my serial number

or what is the general method apps use to recognise my phone?