Yur budget looks realistic and practical expect to the eating out figure.. you may need to incease it up as in any case for family of 4. so add 2000 QAR to it.

for social activity think of increasing it by at least 500 more. so you should have a practical budget of QAR 17500 in total for a normal month.

cell/cable/ - depends on the usage.. for basic usage its fine what u have projected.. 

cheers.