BT has become the first major telecoms company to back Google in a battle with EU regulators, defending the "stability and compatibility" of the Android operating system, which is in the sights of anti-trust regulators. The EU says Google stifles competition by forcing smartphone makers to pre-install its search function and browser to access its other apps, such as Google Play, on Android. "We can confirm that our legal team has written to the European Commission regarding their investigation," said a spokesman for BT.