How to see mobile operator proxy settings
For GSM devices, as far as I know, the proxy settings for your mobile data connection are defined in the Access Point Name (APN). Go to Settings &gt; Wireless and Networks &gt; More &gt; Mobile Networks &gt; Access Point Names &gt; [Your data APN] (your device's menu may differ slightly). Check the Proxy field - it's possible this got modified somehow. Might also be worth snooping around your carrier's website for the recommended APN settings and double-checking that everything is correct. Once finished, press [Menu] &gt; Save and give it a test.