This mobile phone of Nokia is not simple in operating system. One has to read its instruction paper for operating it well and if one has to enjoy all the features of this phone. This phone has very tackling type of operating system.
There is nothing really that wrong with the Symbian 3 OS and the C7 itself is a good handset. The only problems occur when they are loaded up with telco branded software. They render the handset virtually unusable. However the unbranded Nokia firmware - especially the latest versions are great and very stable.
I wouldn't write off this phone until you have spent a decent amount of time getting to know it and it's OS properly. Nothing worth doing happens over night.