Although VPN is fully supported by either iOS or Android and it will protect you fully when accessing websites to download P2P, the mobile/cellular application that you install on your cell phone has access to other data besides your IP address, through which the application can get access to your online activities. This includes your GPS location, contact list, application store ID, etc. The collected data is then directly sent by this application to their parent company, effectively breaking through your VPN. Therefore, in order to enjoy the full benefits of your VPN using a mobile device, it is necessary to access websites only through web pages or their interface using a user-friendly, open-source browser and never through their specific application. Additionally, you also need to know what is the best vpn app so you can use a VPN that is truly safe for you.
Although website censorship is disliked (and tried to be stopped) by people who use VPNs to access it, citizens in most countries have legal rights to privacy, and therefore the use of VPN is rarely considered illegal (even if the content you access when using VPN is possibly illegal), even in countries that block VPNs such as in China, Iran or Syria.
However, since July 2016, using VPN services while in the United Arab Emirates (UAE) is illegal and can be subject to imprisonment and fines between 500,000 to 2,000,000 UAE dirhams (136,130 – 544,521 USD). So, if you plan to travel to the UAE in the near future, we strongly advise you to exercise caution and only enter non-prohibited websites.
As for the censorship imposed by the school or workplace, you should consider it too. If you are caught breaking through the VPN on WiFi or private LAN (no matter how small the possibility), you may face suspension, dismissal or other disciplinary steps, depending on policies that apply to such acts. This should be well considered when deciding whether using a VPN is really worth it.