symbian
Yes it is. It has Symbian Symbian OS 9.1, S60 3rd edition.
no
yes
Simply Press *#0000#Sahraj
there are two nokia c6: c6-00 and c6-01. c6-00 runs on symbian s60v5 c6-01 runs on symbian^3
If you mean Android OS, then no. Nokia C7 use Symbian Anna (previously Symbian^3 and Symbian Belle some time later) as it's OS.
nokia 700
No. The Nokia N79 runs on the Symbian OS.
Symbian is an operating system or fimrware platform for mobile phones. Mostly Nokia
No. It is a Symbian phone.
Nokia 5233