Most of the time, broadband providers aren't going to check your credit score before you sign up for broadband, meaning that no matter what state your credit history is in, you should be able to obtain broadband of any quality.  With that said, because broadband is considered a utility that's loaned to you before you pay it back with every monthly payment, if you don't have enough money in your account when the provider tries to take a direct debit, it could harm your credit score.  That's why getting cheaper broadband could be a good option as it makes it more affordable, thus making you less likely to miss a payment.