NEXAESIM / TRAVEL KNOW-HOW

The NexaEsim journal

Understand your eSIM. Choose your connection. Make more of your trip.

Vietnam travel montage with Ha Long Bay, Hoi An, rice terraces, Golden Bridge and a NexaEsim phone

eSIM guides

Best Mobile Virtual Network Operator in Vietnam: A Guide to iTel, Wintel, Asim, and eSIM Options

Navigating Vietnam's mobile landscape can be complex, with various Mobile Virtual Network Operators (MVNOs) offering diverse services. This guide explores prominent MVNOs like iTel, Wintel, and Asim, detailing their strengths, weaknesses, and network affiliations. We also delve into the convenience of eSIMs for travelers, outlining their benefits and providing a practical comparison of available eSIM data plans for Vietnam, including daily and total data options, fair use policies, and network coverage from major carriers like Vinaphone, Mobifone, and Viettel. Understand your choices for…

Jack Nguyen · 8 min readRead guide →

eSIM guides

Why Your iPhone Might Not Be Compatible with eSIM: A Traveler's Guide (Part 1)

Traveling with an iPhone and planning to use an eSIM for seamless connectivity? This guide, Part 1, explains why some iPhones, including the latest models, might not support eSIM functionality. We cover common issues like carrier locks and regional restrictions, particularly for devices purchased in Mainland China, Hong Kong, or Macao. Learn how to check your iPhone's eSIM compatibility through cellular settings, device information, and IMEI checks, and understand the benefits of eSIM for international travel. Discover initial steps for unlocking your device and essential tips before you…

Jack Nguyen · 7 min readRead guide →

eSIM guides

Which eSIM Works Best in Sapa, Lao Cai, Vietnam? Complete Guide for Travelers (2026)

Planning a trip to Sapa, Vietnam, requires reliable mobile connectivity to navigate its stunning mountainous landscapes and stay connected. This first part of our comprehensive guide explores why staying connected is crucial for a smooth travel experience, from using navigation apps to sharing memorable moments. We delve into the benefits of eSIMs for international travelers, compare the network performance of major Vietnamese carriers like Viettel, Vinaphone, and MobiFone in the Sapa region, and provide practical advice on estimating your data needs. Learn about secure purchasing options…

Jack Nguyen · 12 min readRead guide →

eSIM guides

Best eSIM for Ha Long Bay, Vietnam: Staying Connected While Exploring the Islands (Part 1)

Exploring the breathtaking landscapes of Ha Long Bay, Vietnam, requires reliable mobile connectivity to enhance your travel experience. This first part of our guide delves into why staying connected is crucial, from navigation to sharing memories. We compare the network coverage and performance of major Vietnamese carriers like Viettel, Vinaphone, and MobiFone in the region, helping you understand which provider might best suit your needs. Additionally, we provide practical advice on estimating your data usage, weigh the benefits of eSIMs against traditional physical SIM cards, and outline…

Jack Nguyen · 12 min readRead guide →

eSIM guides

Best SIM/eSIM for Da Nang & Hoi An, Vietnam: Complete Guide for Travelers (2026)

Planning a trip to Da Nang and Hoi An, Vietnam, requires reliable mobile connectivity to navigate these vibrant destinations. This first part of our comprehensive guide explores the crucial role of staying connected, from using navigation apps to sharing your travel experiences. We delve into the benefits of eSIMs for international travelers, compare the network performance of major Vietnamese carriers like Viettel, Vinaphone, and MobiFone in the Da Nang area, and provide practical advice on estimating your data needs. Learn about secure purchasing options for eSIMs and physical SIMs…

Jack Nguyen · 13 min readRead guide →

eSIM guides

Best eSIM for Nha Trang, Vietnam: Your Guide to SIM Cards, Data Plans, and Local Connectivity (Part 1)

Planning a trip to Nha Trang, Vietnam's vibrant coastal city, requires reliable mobile connectivity to navigate its stunning beaches, islands, and cultural sites. This first part of our comprehensive guide delves into why staying connected is crucial for a smooth travel experience, from using navigation apps to sharing memorable moments. We compare the network performance of major Vietnamese carriers like Viettel, Vinaphone, and Mobifone in Nha Trang, explain the advantages of choosing an eSIM over a traditional physical SIM card, and provide practical advice on estimating your data needs.…

Jack Nguyen · 17 min readRead guide →

eSIM guides

Best SIM/eSIM for Ninh Binh, Vietnam: Complete Guide for Travelers (2026)

Planning a trip to Ninh Binh, Vietnam, requires reliable mobile connectivity to navigate its stunning landscapes and stay in touch. This guide, Part 1, offers an in-depth look at choosing the best SIM or eSIM for your journey, focusing on network coverage from major providers like Viettel, Vinaphone, and MobiFone. We explore the practical benefits of having stable mobile data in Ninh Binh's unique terrain, help you estimate your data needs for various activities, and compare the advantages of eSIMs versus physical SIM cards. Learn where to safely purchase your connectivity solution and get…

Jack Nguyen · 9 min readRead guide →

eSIM guides

Which is the Best Sim or eSIM for Ha Giang Loop, Vietnam? Your Complete Guide to Staying Connected

Navigating the remote and stunning Ha Giang Loop in Vietnam requires reliable mobile connectivity. This guide, Part 1, explores the unique challenges of mobile coverage in this mountainous region and compares the performance of major network providers like Viettel, Vinaphone, and MobiFone. We delve into the advantages of using an eSIM for seamless connectivity, offer practical advice on estimating your data needs for various trip lengths, and discuss general cost comparisons between physical SIMs and eSIMs. Learn where to purchase your connectivity solution and understand signal availability…

Jack Nguyen · 13 min readRead guide →

eSIM guides

Vietnam SIM Card: Viettel, Vinaphone & Mobifone — Plans, Prices & Where to Buy

Staying connected in Vietnam is crucial for travelers, and this guide explores the most effective ways to do so. We compare physical SIM cards from major local carriers like Viettel, Vinaphone, and MobiFone with the convenience of eSIMs, detailing their benefits, costs, and purchasing locations. Learn about network coverage, data plans, and essential steps for activation, including passport requirements for physical SIMs and the seamless online process for eSIMs, ensuring you choose the best connectivity option for your trip.

Jack Nguyen · 12 min readRead guide →

eSIM guides

Ho Chi Minh City SIM Card Guide: Where to Buy in the City & Online (Part 1)

Navigating mobile connectivity in Ho Chi Minh City is essential for travelers. This first part of our guide explores your options, from purchasing physical SIM cards at official carrier stores in the city to the convenience of buying an eSIM online before your trip. We detail the benefits and drawbacks of each method, compare major network providers like Viettel, Vinaphone, and MobiFone, and provide crucial information on what to bring and the step-by-step process for acquiring a local SIM. Discover how to stay connected efficiently and avoid common pitfalls in Vietnam's bustling southern…

Jack Nguyen · 9 min readRead guide →

eSIM guides

Tan Son Nhat Airport SIM Card (SGN): Buying Guide & Scams to Avoid (Part 1)

Navigating mobile connectivity upon arrival at Tan Son Nhat International Airport (SGN) in Ho Chi Minh City is crucial for a smooth start to your trip to Vietnam. This guide, Part 1, details the various locations for purchasing SIM cards within the airport, comparing official carrier kiosks with reseller stalls. We cover the major mobile operators—Viettel, Vinaphone, and MobiFone—and their network strengths, along with a breakdown of typical costs for airport SIMs versus city purchases. Additionally, this part provides a step-by-step guide for buying a physical SIM, outlines common scams to…

Jack Nguyen · 15 min readRead guide →

eSIM guides

Noi Bai Airport SIM Card (Hanoi): Buying Guide & Scams to Avoid

Navigating mobile connectivity upon arrival at Noi Bai International Airport (HAN) in Hanoi is essential for a smooth start to your trip. This guide, Part 1, details where to find official SIM card counters for Viettel, Vinaphone, and MobiFone, what to expect regarding pricing, and a step-by-step process for safely purchasing a physical SIM. We also explore the benefits of using an eSIM as a convenient alternative, highlighting various data plans available for Vietnam, and crucial scams to avoid at the airport to ensure reliable connectivity.

Jack Nguyen · 15 min readRead guide →