Greece operates mobile networks on GSM 900/1800 MHz and 3G 2100 MHz bands, with 4G LTE available on bands 3 (1800 MHz), 7 (2600 MHz), and 20 (800 MHz). As of 2024, three major mobile network operators provide coverage: Cosmote (owned by Deutsche Telekom), Vodafone Greece, and Wind Hellas (now merged with Nova to form Wind Tre). Cosmote holds approximately 38 percent market share, Vodafone approximately 29 percent, and Wind approximately 33 percent according to Hellenic Telecommunications and Post Commission (EETT) data from 2023. All three operators offer prepaid SIM cards to tourists without requiring Greek residency or tax identification numbers.
Population registry rules changed in 2022 following European Union anti-terrorism regulations. Foreign visitors must present a valid passport at point of purchase for any prepaid SIM card. Staff at authorized retail locations enter passport details into a national database maintained by EETT before activation. This process typically requires five to fifteen minutes in urban retail stores. Copies of passports are not accepted; the original document must be presented. Electronic passport verification systems read the machine-readable zone on the identification page.
Cosmote operates approximately 7,800 base stations across Greece as of 2023. The network provides 4G coverage to 99.5 percent of the population according to company reports filed with EETT in March 2023, though geographic coverage (measured by land area rather than population) reaches approximately 85 percent due to mountainous terrain in regions including the Pindus Mountains and areas of Crete. The company launched 5G service in Athens, Thessaloniki, and fifteen other cities in July 2021, with 5G coverage reaching approximately 55 percent of the population by December 2023. Cosmote retail stores operate in all cities with populations exceeding 10,000 residents. Authorized resellers include Germanos electronics stores (approximately 200 locations nationwide), WIND shops that sell competitor SIM cards, and selected supermarket chains including AB Vassilopoulos and Sklavenitis.
Vodafone Greece maintains approximately 6,200 base stations with 4G population coverage at 98.7 percent as reported to EETT in February 2023. The network launched 5G in Athens and Thessaloniki in December 2020, expanding to Patras, Heraklion, and Larissa by June 2023. Vodafone operates branded retail stores in 47 cities, with the highest concentration in Athens (23 stores), Thessaloniki (11 stores), and Patras (4 stores). Mini markets and kiosks (periptera) in tourist areas of Athens, particularly the Plaka neighborhood and streets surrounding Syntagma Square, sell Vodafone prepaid starter packs. Athens International Airport hosts Vodafone and Cosmote retail counters in the arrivals hall of the main terminal building, operating from 0700 to 2300 daily.
Wind Hellas operates approximately 5,400 base stations following network consolidation with Nova infrastructure in 2023. The combined network achieves 4G population coverage of 97.3 percent according to EETT verification measurements conducted in October 2023. Wind introduced 5G service in Athens, Thessaloniki, Patras, and Heraklion in March 2022. The company maintains retail presence through approximately 180 branded stores and partnerships with Kotsovolos electronics retail chain (95 locations). Wind's prepaid packages typically cost 5 to 10 percent less than equivalent Cosmote offerings, though network congestion measurements by independent testing firm Tutela in summer 2023 showed average download speeds of 28.4 Mbps for Wind compared to 42.7 Mbps for Cosmote during peak usage hours (1100-1400 and 1900-2200) on Greek islands including Santorini, Mykonos, and Rhodes.
Prepaid SIM card starter packs range from 5 euros to 15 euros depending on included data allowances. Cosmote's tourist-focused "What's Up Tourist" package costs 10 euros and includes 6 GB of 4G data valid for 30 days with unlimited calls within Greece, available at Eleftherios Venizelos Airport and major tourist zones in Athens, Thessaloniki, Heraklion, and Rhodes Town. Vodafone's "Vodafone CU" prepaid plan offers 8 GB for 10 euros with 28-day validity. Wind's "Wind All Inclusive" provides 10 GB for 12 euros valid 30 days. These prices reflect January 2024 retail pricing and include the 24 percent value-added tax charged on telecommunications services in Greece. Prices at airport retail locations match city prices; no airport premium applies at Athens International Airport or Thessaloniki Airport Macedonia based on comparison shopping conducted in December 2023.
Data top-ups after initial package exhaustion cost approximately 1 euro per GB for single-use additions or 15 to 25 euros for monthly renewable packages of 20 to 40 GB. Cosmote charges 20 euros for 25 GB valid 30 days. Vodafone offers 30 GB for 20 euros with 28-day validity. Wind provides 40 GB for 25 euros valid 30 days. Top-ups can be purchased at retail stores, through mobile apps available for iOS and Android, or via SMS commands. Automated top-up kiosks exist in Cosmote and Vodafone stores in Athens and Thessaloniki but require Greek language navigation. Scratch cards for top-ups are sold at periptera kiosks nationwide in denominations of 5, 10, 15, and 20 euros.
International calling rates from Greek prepaid SIM cards to numbers outside Greece range from 0.15 euros per minute to 0.50 euros per minute depending on destination. Calls to European Union countries cost 0.15 to 0.20 euros per minute on Cosmote and Vodafone networks as of January 2024. Calls to the United States and Canada cost 0.25 to 0.30 euros per minute. Calls to Australia cost 0.40 to 0.50 euros per minute. International SMS messages cost 0.10 to 0.15 euros per message. These rates apply when using the standard prepaid voice balance; specialized international calling packages reduce per-minute costs to 0.05 to 0.10 euros for frequent users.
European Union roaming regulations allow prepaid SIM cards purchased in Greece to function in other EU countries at domestic rates without additional charges. A Cosmote SIM card with 10 GB of Greek data includes the same 10 GB allowance when used in Spain, Italy, France, or any of the 27 EU member states. Roaming fair use policies implemented in June 2022 limit this to four consecutive months of majority use outside Greece. After four months, operators can apply surcharges of 0.002 euros per MB (approximately 2 euros per GB). This policy does not affect tourists on trips under four months. Use in non-EU countries including the United Kingdom, Switzerland, Turkey, and Albania incurs roaming charges ranging from 0.05 to 0.20 euros per MB depending on bilateral agreements.
Network coverage in the Cyclades Islands varies by island size and tourism volume. Santorini receives 4G coverage from all three operators across the entire island including Fira, Oia, and Kamari, with 5G available from Cosmote in Fira and Oia since August 2023. Mykonos has complete 4G coverage with 5G from Cosmote and Vodafone in Mykonos Town and tourist beaches. Smaller Cyclades islands including Folegandros, Sikinos, and Anafi have 3G and 4G from Cosmote only, with no Vodafone or Wind presence. Speed tests conducted by EETT in July 2023 measured average 4G download speeds of 35.2 Mbps in Santorini, 31.8 Mbps in Mykonos, and 18.4 Mbps in Naxos during peak tourist season.
The Dodecanese Islands show similar patterns. Rhodes Town and Lindos have 4G coverage from all operators with 5G from Cosmote since May 2023. Kos Island has full 4G coverage from Cosmote and Vodafone, partial coverage from Wind. Smaller islands including Symi, Kalymnos, and Leros rely primarily on Cosmote 3G and 4G networks. Karpathos has Cosmote 4G in Pigadia and the airport area, 3G in mountain villages. EETT measurements from August 2023 recorded 4G speeds averaging 29.7 Mbps in Rhodes, 24.3 Mbps in Kos, and 12.1 Mbps in Karpathos.
Crete maintains robust coverage across the northern coast. Heraklion, Chania, Rethymno, and Agios Nikolaos have 4G from all three operators with 5G available from Cosmote and Vodafone in Heraklion and Chania since April 2023. The southern coast shows reduced coverage. Hora Sfakion, Paleochora, and coastal areas south of the Lefka Ori (White Mountains) have 3G from Cosmote, intermittent 4G from Vodafone, minimal Wind coverage. Samaria Gorge, a 16-kilometer hiking route, has no mobile signal for the central 12 kilometers between Xyloskalo entrance and Agia Roumeli village. The Lasithi Plateau at 840 meters elevation has 4G Cosmote coverage, 3G Vodafone coverage.
Mainland mountain regions present coverage challenges. The Pindus Mountains including Vikos-Aoös National Park have Cosmote 3G coverage in villages including Papingo and Konitsa, with signal gaps on mountain trails. Vikos Gorge, which Guinness World Records lists as the deepest canyon relative to width, has no coverage for most of its length. Mount Olympus trails above Prionia (elevation 1,100 meters) lose signal; the summit at 2,918 meters has no coverage from any operator. Parnassus National Park shows 4G coverage from Cosmote in Arachova village, intermittent 3G on ski resort access roads, no coverage above 1,800 meters elevation.
The Peloponnese Peninsula has 4G coverage in coastal cities including Patras, Kalamata, and Nafplio from all operators. Interior regions including ancient sites at Olympia and Mycenae have Cosmote 4G, Vodafone 3G and 4G, limited Wind coverage. The Mani Peninsula's southern tip near Cape Matapan has 3G from Cosmote only. Monemvasia maintains 4G from Cosmote and Vodafone. Speed tests by independent firm Opensignal in September 2023 measured average 4G speeds of 33.4 Mbps in Patras, 27.8 Mbps in Kalamata, 21.2 Mbps in rural Arcadia.
Ionian Islands coverage centers on tourist infrastructure. Corfu has 4G from all operators with 5G from Cosmote in Corfu Town since July 2023. Kefalonia shows 4G coverage from Cosmote and Vodafone in Argostoli, Sami, and Fiskardo, with 3G in mountain villages. Zakynthos (also called Zante) has 4G coverage island-wide from Cosmote, partial 4G from Vodafone and Wind. Navagio Beach (Shipwreck Beach) on Zakynthos's northwest coast accessed only by boat has 4G signal from Cosmote and intermittent 3G from Vodafone. Lefkada maintains 4G coverage from all operators on the eastern coast, 3G on the western coast. Ithaca has Cosmote 4G in Vathy, 3G elsewhere.
Athens metropolitan area receives 5G coverage from all three operators as of January 2024. Cosmote's 5G network covers neighborhoods including Syntagma, Plaka, Monastiraki, Kolonaki, Kifisia, and Glyfada. Vodafone 5G serves central Athens, Piraeus, and northern suburbs. Wind 5G covers Syntagma Square, the Acropolis area, and Piraeus port. 4G coverage blankets the entire metropolitan area including Athens International Airport 27 kilometers east of the city center. Metro tunnels on Lines 2 (Red) and 3 (Blue) have 4G coverage from all operators; Line 1 (Green) has gaps in coverage between Omonia and Kifissia stations. Speed tests by Ookla in December 2023 measured median 5G download speeds of 287 Mbps for Cosmote, 241 Mbps for Vodafone, and 198 Mbps for Wind in central Athens.
Thessaloniki shows similar urban coverage patterns. All three operators provide 5G in the city center, waterfront area, and Aristotelous Square. The White Tower landmark and Roman Agora area have 5G from Cosmote and Vodafone. Thessaloniki Airport Makedonia, 13 kilometers southeast of downtown, has 4G and 5G coverage from all operators. University campus areas near Aristotle University have congestion during academic terms, with measured speeds dropping from typical 40-50 Mbps to 15-20 Mbps between 1200 and 1400 on weekdays according to Tutela measurements from October 2023.
Public Wi-Fi networks in Greece require caution regarding security. The government operated a free Wi-Fi initiative called "WiFi4EU" funded by the European Union, installing access points in public squares of 138 Greek municipalities between 2019 and 2022. These networks require no password and encrypt no data. Syntagma Square in Athens has open Wi-Fi with bandwidth limited to 5 Mbps per device. Aristotelous Square in Thessaloniki provides similar open access. Cafes and restaurants typically offer Wi-Fi passwords to customers, with speeds ranging from 5 to 25 Mbps depending on the establishment's internet subscription. McDonald's locations (approximately 35 in Greece) provide free Wi-Fi limited to one hour per session. Starbucks stores (approximately 45 locations) offer unlimited Wi-Fi requiring email registration.
Athens International Airport provides free Wi-Fi with no time limit or registration requirement as of 2024. The network operates on 2.4 GHz and 5 GHz bands with measured speeds averaging 18.3 Mbps download and 12.7 Mbps upload during testing in November 2023. Thessaloniki Airport Macedonia offers similar free Wi-Fi with average speeds of 14.2 Mbps download. Smaller airports including those on Rhodes, Heraklion, Santorini, and Mykonos have free Wi-Fi networks with speeds ranging from 8 to 15 Mbps. Ports including Piraeus, Rafina, and Heraklion have no reliable public Wi-Fi; ferry companies including Blue Star Ferries and Minoan Lines do not provide onboard Wi-Fi on routes between Athens and the islands.
SIM card activation typically completes within 15 to 45 minutes after purchase. Store staff at authorized retail locations submit passport information and SIM card serial numbers to the central EETT database electronically. The activation process sends a confirmation SMS to the new number once registration completes. During high tourist season months (June through September), activation delays can extend to 2 to 3 hours due to database processing backlogs. Purchase after 1800 hours may result in activation completing the following morning, though this affects less than 10 percent of purchases based on operator estimates from summer 2023. Ports and airports process activations continuously during operating hours without overnight delays.
eSIM technology became available from Cosmote in March 2023 and from Vodafone in June 2023. Wind does not offer eSIM as of January 2024. Cosmote's eSIM requires downloading a QR code from staff at retail locations after passport verification. The process requires a compatible device with eSIM capability and internet connection to download the eSIM profile. Vodafone's eSIM functions identically. Both operators charge the same prices for eSIM as physical SIM cards. Airport locations of both operators can provide eSIM QR codes, though staff reported in December 2023 that fewer than 5 percent of tourists request eSIM over physical cards, primarily due to unfamiliarity with the technology.
Data speed throttling occurs after prepaid allowance exhaustion. Cosmote reduces speeds to 128 kbps after the included data package depletes. Vodafone throttles to 64 kbps. Wind blocks data entirely until top-up purchase. These policies are disclosed in plan terms available at point of sale. The 128 kbps throttled speed allows basic messaging applications including WhatsApp and Viber to function for text messages, but prevents image loading and video streaming. The 64 kbps Vodafone throttle permits only text-based applications to function minimally. Automatic top-up options exist through mobile apps but require pre-saved payment methods.