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# FAQ

We've collected answers to the questions our users ask most often. Choose a category below or use search.

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Didn't find the answer you need? Contact us: [Contact us](../../contact-us.md)
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### Categories

* [**🔥 Popular questions**](general-questions.md) - short answers about p0f, UDP, static IPs, countries, pricing, connection, and the API
* [**Residential proxies**](residential-proxies.md) - questions about using Residential proxies, session generation, and IP rotation
* [**Datacenter / ISP proxies**](datacenter-isp-proxies.md) - questions about static proxies, datacenters, and ISP
* [**Mobile proxies**](mobile-proxies.md) - questions about Mobile proxies

### General articles

* [How to check whether a proxy works](how-to-check-proxy.md)
* [Proxies are not working](proxy-not-working.md)
* [The proxy location is incorrect!](wrong-proxy-location.md)