Roamic

Roamic, a European company, takes the pressure off data rationing with unlimited-data plans available for Turkey and the wider region. The catch is a 3GB daily speed cap: once you've used 3GB in a calendar day, speeds throttle to 3G but data flows still count as unlimited. This structure suits travelers who occasionally need to download large files but don't require sustained high-speed browsing every day.

Pick Roamic if you want worry-free connectivity without monitoring your consumption but accept that heavy use days will hit throttling. It's cheaper than per-gigabyte plans if you consistently use data throughout your stay, even with the daily cap.