Despite mounting evidence that mandatory SIM registration is costly, intrusive and not the solution to the problem most countries are trying to solve, every year more governments try to roll it out.

Legal Void

SIM card registration is often introduced in a legal void. According to GSMA, only 59% of countries mandating SIM card registration have a privacy and/or data protection framework in place.  In the absence of comprehensive data protection legislation and oversight, SIM users' information can be shared and matched with other private and public databases, enabling the state to create comprehensive profiles of individual citizens, and enabling companies and third parties to access a vast amount of data. SIM registration is being taken to the next level and incorprating biometric registration in some countries, such as fingerprints and facial recognition. This means that the data processing required for the creation of a biometric subscriber database will also often occur in a legal void, so that information collected as part of registration today could be kept for an indefinite amount of time and used for different purposes in the future, as technology, corporate incentives, or governments change.

Surveillance

By facilitating the creation of an extensive database of user information, mandatory SIM registration places individuals at risk of being tracked or targeted, and having their private information misused. SIM registration undermines the ability of users to communicate anonymously and one’s right to privacy. This poses a threat to vulnerable groups, and facilitates surveillance by making tracking and monitoring of users easier for law enforcement authorities. Mandatory SIM registration can enable profiling with several consequences. An individual's phone number could potentially be matched with their voting preferences or health data, enabling governments to identify and target political opponents, for example, or people living with HIV/AIDs. In countries with political and ethnic tensions, pairing data with political activity might result in physical risks for the people involved. While communications surveillance systems may help a government improve national security, they are equally likely to enable the surveillance of human rights defenders, political, immigrants, and other groups.

Discrimination and Exclusion

SIM registration also brings the potential for discrimination and even exclusion from basic services. This practice disproportionately disadvantages the most marginalised groups and can have a discriminatory effect by excluding users from accessing mobile networks.When mobile phones are the most common form of accessing important avenues such as banking and finance, this could result in exclusion from numerous vital public services. In some countries, the poorest individuals are often unable to buy or register SIM cards because they don't have identification documents. Undocumented migrants can face a similar problem. In addition, given the extra burdens that SIM registration places on telcos, this may result in additional costs being passed on to customers.