I have exactly the same issue. It doesn't matter where I connect to wifi, so that rules out an issue with one particular router. I've reset network settings a number of times without success. Any idea?
yes i have the same issue from 4 months. they are not giving a trusted solution. however i saw 6.1.1 update is available but not sure that'll sort out my issue. really frustrated and need to rethink when going for new apple product in future !!