1. Go to your android settings and tap ‘Wi-Fi & internet’

2. You will see a list of available Wi-Fi networks. Search for yours and connect to it. 

3. Tap on the gear icon beside the network, and then click on modify

4. Expand the proxy dropdown

5. Selecting manual. By doing this, you will configure your android Wi-Fi proxy settings app by yourself. Your network administrator at work or school would give you a PAC file to allow you manually configure the proxy settings. If you select Proxy Auto-Config however, the right settings for your network would be detected automatically. You would have to enter the address of the auto-configuration script (PAC file). Your service provider can provide you with this.

6. Input the information in the appropriate fields

The following are fields that would be required:

PROXY PORT: here you would have to input the numbers that come after the hostname or IP address. it’s separated from the rest by a colon.

PROXY HOSTNAME: in this field, you would have to input the proxy server’s hostname or the proxy IP address. a hostname appears as follows; en.proxy.net. an IP appears as follows; 010.199.212.003.

BYPASS PROXY FOR: this lets you select the websites that would not send requests through the proxy server. you can add multiple websites, but you would need to separate each with a comma and without any space.

7. Android doesn’t allow for proxy authentication in the android Wi-Fi proxy settings app. So you will authenticate when you open your web browser by entering your username and password.
8. Test your proxy settings. One way to do this is by checking your IP address to see if it has changed.

Note that Android doesn’t support Web Proxy Auto-Discovery Protocol (WPAD). And so when you enable it, you will also need to provide the PAC file address so that Android can get the settings. This protocol is sometimes used on private networks belonging to schools or businesses to distribute proxy settings automatically.

You will get the ‘ERR tunnel connection failed’ error if your connection through a proxy fails. Two of the most common reasons for this are:

• Your proxies are not yet authenticated. This can happen if you enter the wrong credentials, or you whitelist the wrong IP address.
• It can also happen if the proxy server is down. In such a situation, put the proxy off and on. If nothing still changes, be patient until the server is up.

Interesting read : 5 Tips When Using a Bot To Avoid Proxy Blocks

1. Go to your android Wi-Fi proxy settings app and tap on Wi-Fi & internet
2. Click on the gear icon beside your connected network
3. Tap on modify and a pop up would appear
4. Expand the proxy dropdown
5. Select ‘None’ among the options