After our recent move I was informed TT didn't have a spare internet module near the apartment.
I went into one of the shops just passed the PTT and was shown a "Mobile Wifi" unit. 15.5 GB.
600 tl for the unit, 90 for the sim and 60 for the 15.5 gb.
Where ever you are , as long as you have it near, you have your own personal WiFi.