Hello, first, you should make sure your SIM has fee, secondly, you should simply set up HUAWEI E5331 because sometimes, they can't auto ping the ISP and get connected. The most important to set up is the dial number and APN of your ISP. dial number is defaulted to be *99#, ISP APN, you could check your ISP or search it online.
By the way it's better to buy an unlocked one rather than one with contract.
Hope my suggestion help you.
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