When exploring iconic sites like Ha Long Bay, you'll generally find strong signal near the main piers and on larger tour boats, especially closer to the mainland, allowing you to share stunning photos of the karst landscapes. However, deep inside the Cu Chi Tunnels near Ho Chi Minh City, or in very remote parts of the bay, connectivity might be limited due to underground structures or distance from cell towers. EastESIM partners with top local carriers like Viettel and Mobifone to maximize your coverage, ensuring you're connected where it matters most for navigation and sharing your adventures.
HELP CENTER
Will my EastESIM provide internet signal at Ha Long Bay or the Cu Chi Tunnels?
Updated April 22, 2026
Was this answer helpful?
Related questions
Other answers in this topic that travelers found useful.
What is the network coverage like? Does it work well in Bangkok, Phuket, and the islands?
Yes. Thailand has an excellent 4G/5G infrastructure, especially in tourist areas. You can expect a reliable, high-speed connection whe…
Read answerWhy use an eSIM instead of buying a physical SIM at the airport?
An eSIM is much more convenient. You skip the long SIM card queues at the airport. You also avoid the mandatory passport registration and pa…
Read answerWhat happens if I run out of data? Will I be overcharged?
If you reach your data limit, your connection will simply stop. You will never be charged extra fees or unexpected roaming charges. If…
Read answerYou have 23 limited and 16 unlimited plans. Which one should I choose?
It depends on your trip. For a short trip to Bangkok (3-5 days) using maps and social media, a 3GB or 5GB plan is often perfect. Howev…
Read answerWill I get a local Thai phone number with this eSIM?
These plans are typically data-only , which means they do not include a local Thai phone number. You can continue to use your existing…
Read answer