Thailand eSIM

Mobile Networks & Coverage in Thailand

e1sim Thailand plans run on AIS — Thailand's largest and most widely used mobile network, with extensive 4G LTE coverage across the country. You get a reliable signal in Bangkok, Chiang Mai, Chiang Rai, Pattaya, Hua Hin and all major cities, as well as in resort areas and tourist hubs throughout the country. AIS is widely regarded as having the best rural coverage in Thailand, which matters when you venture off the tourist trail.

Island coverage is excellent on Thailand's most popular destinations. Koh Samui, Koh Phangan and Koh Tao in the Gulf of Thailand all have strong 4G LTE. On the Andaman side, Phuket, Krabi town, Koh Lanta and the Phi Phi islands all have dependable connectivity in resort areas. Smaller uninhabited islands and open-water ferry crossings can have limited signal, but coverage returns near any inhabited shore.

Koh Samui & Koh Phangan — The Gulf's Sunny Secret in Summer

Here is something every smart Thailand traveller knows: the Gulf of Thailand coast — Koh Samui, Koh Phangan and Koh Tao — sits on the opposite side of the peninsula from Phuket and follows a completely different weather pattern. While the Andaman coast (Phuket, Krabi, Koh Phi Phi) enters its wet monsoon season from May through October, the Gulf islands enjoy their dry season from roughly February through October, with calm seas, clear skies and reliably sunny weather throughout the summer months. If you're travelling between June and September and want guaranteed beach weather, the Gulf is the right choice.

Koh Samui is the Gulf's largest and most developed island, with a polished mix of luxury resorts, beach clubs, jungle waterfalls and a busy expat and digital-nomad scene. Chaweng Beach is the island's buzzing social hub — a long arc of white sand backed by bars, restaurants and beach clubs; Lamai offers a more relaxed vibe. The interior hides Namuang Waterfall, the Big Buddha temple and a ring road that rewards scooter exploration. Your AIS eSIM delivers fast 4G wherever you roam on the island.

Koh Phangan — just a short ferry north of Samui — is world-famous for the Full Moon Party, a monthly all-night beach rave at Haad Rin that draws thousands of travellers from every corner of the globe. But Phangan has a quieter side too: the northern and western coasts are lined with chilled-out yoga retreats, organic cafés and pristine bays like Thong Nai Pan Yai, where the sea is clear and the crowds thin. Koh Tao, another hop north, is one of the world's most popular dive sites — affordable PADI courses, technicolour coral reefs and gentle whale sharks make it a bucket-list destination for underwater enthusiasts.

Bangkok & Chiang Mai — Temples, Street Food and Mountain Mist

Bangkok is one of Asia's great cities: chaotic, electric, endlessly surprising. The Grand Palace and Wat Phra Kaew dazzle with gold-spired pavilions and emerald Buddhas; Wat Pho has the largest reclining Buddha in Thailand; Wat Arun glitters across the Chao Phraya River at sunset. Yaowarat — Chinatown — comes alive after dark with rooftop bars, sizzling woks and impossible crowds of street-food enthusiasts. The Skytrain and metro cover most tourist areas, and your eSIM handles Grab (Thailand's Uber equivalent) for everything else.

Chiang Mai, six hundred kilometres north in the forested hills, is Thailand's cultural capital and a haven for trekkers, temple-hoppers and slow travellers. The old moat city holds over three hundred temples; Doi Suthep, the mountain monastery visible from every rooftop, rewards a sunrise visit. The Sunday Walking Street market, Thai cooking classes, elephant sanctuary day trips and mountain biking in Doi Inthanon National Park (Thailand's highest peak) make Chiang Mai easy to linger in for weeks. AIS 4G reaches all the main trekking villages and guesthouses in the hills.