Product info
Kos eSIM plans
| Unlimited data · 5 days | $15.99 | Buy eSIM |
| Ohayu recommendsUnlimited data · 10 days | $27.99 | Buy eSIM |
| Unlimited data · 15 days | $36.99 | Buy eSIM |
| Unlimited data · 30 days | $49.99 | Buy eSIM |
| 3GB prepaid eSIM · 14 days | $9.49$3.16 / GB | Buy eSIM |
| 5GB prepaid eSIM · 30 days | $13.49$2.70 / GB | Buy eSIM |
| 10GB prepaid eSIM · 30 days | $19.99$2.00 / GB | Buy eSIM |
| 15GB prepaid eSIM · 60 days | $27.79$1.85 / GB | Buy eSIM |
| 20GB prepaid eSIM · 90 days | $35.49$1.77 / GB | Buy eSIM |
| 50GB prepaid eSIM · 90 days | $90.49$1.81 / GB | Buy eSIM |
You can install your eSIM before the trip and activate it when you arrive in Greece. Validity starts after eSIM activation.
Plan details
How much mobile data you need
What's the best eSIM for Kos?
A beach week – 3 GB
Maps, tavernas, photos.
Cycling the island – 10 GB
Navigation all day, a fortnight.
Dodecanese hopping – 20 GB
Kos, Rhodes, Kalymnos.
A longer stay – Unlimited
Tethering from an apartment.
Coverage and network
Coverage end to end on a flat island
Greece mobile networks
Kos is 40 km long, mostly flat and easy to cross, which makes it one of the more straightforwardly covered Greek islands - there are few hills to shadow a signal. The complication is that Bodrum is 5 km away across the strait.
Speedtest Global Index · Mobile · Greece · June 2026
Download
145.06 Mbps
Upload
15.74 Mbps
Latency
20 ms
Global rank
#28 of 98
Kos, specifically
- Kos Town: Consistent coverage. Flat, compact and well served.
- The cycle paths: Kos is the Greek island people cycle, with dedicated paths running out of town in both directions. They stay in coverage, which is useful when you have gone further than you meant to.
- Tigaki, Kardamena, Kefalos: The resort areas are covered. Kefalos at the far southwest end is the thinnest part.
- Zia and Mount Dikeos: The mountain village has service; the trails above it get patchy near the summit.
- The Bodrum strait: Turkish networks are easily strong enough to reach the east side of Kos, and phones do sometimes register on them. A Greek plan does not cover Turkey, so this is worth watching.
Kos, Greece - and not Turkey
The plan covers all of Greece, Kos and the wider Dodecanese included. Turkey, 5 km away, is a separate destination.
How to install eSIM
Connected in 3 steps
- 01
Buy before you fly
Choose your data plan before your trip.
- 02
Download & install
Log in to your account, tap your eSIM, and follow the on-screen instructions.
- 03
Land & activate
Activate when you arrive in Greece. Turn on roaming for the eSIM and it connects to a local network.
Before you buy, make sure your phone supports eSIM — see Ohayu compatible devices list or dial *#06#. It's a free request to your phone's settings. If you see the EID number — your phone is eSIM-compatible.
Arriving on Kos
Airport Wi-Fi at KGS
Hippocrates airport runs the Fraport network with a browser welcome page. It sits in the middle of the island, about 25 km from Kos Town, so the transfer is where you will want data rather than the terminal.
Side by side
Kos eSIM Comparison
Indicative comparison based on publicly listed Greece plans as of August 2026. Competitor pricing and policies change - check their sites for current terms.
Frequently asked questions
Where to buy a SIM card on Kos?
A few outlets in Kos Town and seasonal shops in the resorts. Passport needed for registration. The airport counter is limited, and the island is small enough that town is an easy trip anyway.
My phone connected to a Turkish network - what happened?
Bodrum is about 5 km across the strait and Turkish masts reach the east side of Kos comfortably. If your phone picks one, you have left the plan's coverage without leaving the island. Set your network selection to a Greek operator manually if it keeps happening, and note that the ferry to Bodrum takes you out of coverage properly.
Is the island easy to cover by bike?
Yes, and the coverage helps - the dedicated cycle paths out of Kos Town stay in signal, which is reassuring on a flat island where it is easy to ride 20 km without noticing. The far southwest around Kefalos is the one stretch to be careful about.
eSIM not working on Kos?
First check the network name - on the east coast phones sometimes register on a Turkish mast, which is outside the plan. If you are on a Greek network, make Ohayu the mobile data line, enable roaming, then toggle Airplane mode. Chat and support@ohayu.com are open 24/7.
