Editing UMTS (section)

=== Security issues ===
As early as 2008, it was known that carrier networks can be used to surreptitiously gather user location information.<ref name=wp814>{{cite news|author1=Craig Timberg|title=For sale: Systems that can secretly track where cellphone users go around the globe|url=https://www.washingtonpost.com/business/technology/for-sale-systems-that-can-secretly-track-where-cellphone-users-go-around-the-globe/2014/08/24/f0700e8a-f003-11e3-bf76-447a5df6411f_story.html|access-date=20 December 2014|newspaper=Washington Post|date=24 August 2014}}</ref> In August 2014, the [[Washington Post]] reported on widespread marketing of surveillance systems using [[Signalling System No. 7]] (SS7) protocols to locate callers anywhere in the world.<ref name=wp814/>

In December 2014, news broke that SS7's very own functions can be repurposed for surveillance, because of its relaxed security, in order to listen to calls in real time or to record encrypted calls and texts for later decryption, or to defraud users and cellular carriers.<ref name=wp1214>{{cite news|author1=Craig Timberg|title=German researchers discover a flaw that could let anyone listen to your cell calls.|url=https://www.washingtonpost.com/blogs/the-switch/wp/2014/12/18/german-researchers-discover-a-flaw-that-could-let-anyone-listen-to-your-cell-calls-and-read-your-texts/|access-date=20 December 2014|work=The Switch- Washington Post|date=18 December 2014}}</ref>

[[Deutsche Telekom]] and Vodafone declared the same day that they had fixed gaps in their networks, but that the problem is global and can only be fixed with a telecommunication system-wide solution.<ref name=ard>{{cite news|author1=Peter Onneken|title=Sicherheitslücken im UMTS-Netz|url=https://www.tagesschau.de/inland/umts-sicherheitsluecken-101.html|access-date=20 December 2014|work=Tagesschau|publisher=ARD-aktuell / tagesschau.de|date=18 December 2014|language=de}}</ref>