How to change DNS settings on iOS?

Question

iOS

With WiFi, everything is simple and clear.
How to change DNS on iPhone when using cellular data (eg 3G)?

Answer 1

Of the paid ones, AdGuard Pro is the most suitable .
He knows how to block ads out of the box,
and also allows you to specify your own DNS.
And what is a plus, you can specify encrypted DNS.
Ads are interestingly blocked. A local VPN is created on the iPhone, which filters ads in all applications. Now Apple has banned everyone from doing this, so AdGuard Pro (and its analogues) will no longer be updated. But so far it's working fine.