Samsung has pulled a software update for U.K.-based Galaxy S3 owners to version 4.3 of the Android operating system. The download reportedly caused numerous problems to the Galaxy S3 devices, incuding faster than normal battery drain, some apps refusing to work and alarms failing to trigger.

Samsung said it was now investigating the matter.

AT&T has also pulled the 4.3 update for subscribers who own the newer S4 handsets.