@Laura @Anna plz check this out. We need a fix for this issue. The camera can't switch to 2X optical zoom. Sometimes it works and sometimes it doesn't. Plz, forward this to the concerned department.
Thank you. :)
The telephoto lens works only when there is proper lighting. Indoor or outdoor does not matter. I did a thorough test in it. Tap on the 2x zoom and point at a direction where light source is there, and the telephoto lens will work.