When I open the browser, it says "Here are some suggestions: 1. Check to make sure your device has a signal and data connection. 2. Reload this web page later. 3. View a cached copy of the web page from Google." I can send and recieve texts and calls, but I can't get on the Market or check my email or use apps that need the internet. My "3G" sign is not at the top by my bars. Can anyone help?