You can try one of these steps to solve it.
- Is the problem recently? Have you ever used the phone when this all worked? Maybe then you can try to reset your phone. By setting your phone to the factory settings maybe some kind of glitch will be solved.
- If you've never used other applications on the internet before, and you are using the phone for some time now. Maybe you can try to contact the manufacturer of your device. They can maybe help you better. Because I think, in that case, there is probably something wrong with your phone.
PS: Are you sure you are correctly connected to the web? Maybe if you are using a cellular network, it can be very slow.. Also check this link.