This is the 9117th most frequent Turkish word.
turkcell
Turkcell: A leading mobile network operator and telecommunications company in Turkey.
Here, 'Türkcell' is used as a brand name referring to a telecommunications service provider.
Türkcell ile ailesiyle iletişimde kalır.
With Türkcell, he stays in touch with his family.
In this sentence, 'Türkcell'in' is possessive, meaning 'of Türkcell,' which denotes ownership or association.
Türkcell'in kampanyalarından faydalanıyorum.
I am taking advantage of Türkcell's offers.
The word 'Türkcell' describes the type or brand of the telephone line.