From my experience I can advise you to buy mobile phone signal booster. I got one and I'm very impressed. You can even order boosters for your office, car, hotel etc. Now I have no missed calls and I'm available everywhere. That's really amazing.
Clash of clans is one of my favourite games on a mobile phone or a tablet. I've been playing it for a year but still I am far beyond the desired level of skill and settlement development. I though of donating money but every time I realised that it would really stupid to waste money you earned so hard. Luckily, I've found clash of clans mod that enabled me to get all the benefits of playing the game.
It`s amazing how greatly modern technologies have developed, some time ago it needed to put a bug inside someone`s phone to hear what he`s saying to someone else and now you just need to install one app on your smartphone and everything works at once, visit this site cellphonetrackapp.net/ to easilu find something like that if you need it!