You really wouldn't want to be a mobile operator at the moment. Firstly the headache of trying to get back all those billions you paid at auction for nought. Secondly, your customers are shedding their contracts and realising they can get better deals on PAYG. Thirdly, the take up of 3G and data contracts is pretty poor as people would happily use the bosses pc at work thank you very much. Then to boot we have wifi hot spots popping up around the world, many are now free and VOIP is taking off in a big way.
Mind you it can't looking all that great for fixed line operators either. When people wake up to VOIP or the various cut price long distance providers that are around then poor old BT will suffer even more.