The UPND did not accept the credibility of the election. These websites fall under 30 categoriesranging from news media, file sharing and culture, to provocative or objectionable categories, like pornography, political criticism, and hate speech. Zamtel has the largest share of internet subscriptions, but the smallest share in the mobile phone market, where Airtel and MTN have the largest shares. Opposition members and civil society groups criticised this move on the grounds that the contract with the Dubai firm was significantly more expensive than previous contracts, and that it increased the possibility of electoral fraud. In short, OONI considers a website to be blocked if connections to it consistently fail across the testing period and if it exhibits a low overall failure rate from control vantage points. The PF government was also criticised for its delay in releasing the Bill of Rights, preventing voters from reading in advance the contents that they were asked to vote for or against. Depending on whether the HTTP headers that are sent and received from a backend control server are the same or not, OONI is able to evaluate whether software — which could be responsible for traffic manipulation — is present in the tested network. Another limitation to this study is the amount and type of URLs that were tested for censorship.