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eSIM & Travel Guide

How to choose an eSIM, connectivity tips, and travel experiences for Vietnamese travelers abroad.

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Travel eSIM Plans · 14 min read Best eSIM USA World Cup 2026: Plans, Prices and Setup Compared By Mihi Compare the best eSIMs for the USA during World Cup 2026: real per-GB prices, USA-only vs North America plans, stadium data tips,… Read post eSIM Basics · 11 min read How Does Dual SIM Work? Pairing a Home SIM with a Travel eSIM By Mihi Dual SIM runs two lines at once: keep your home SIM for calls and OTP codes, add a travel eSIM for cheap… Read post eSIM Basics · 10 min read EID Number Explained: How to Find It Fast on iPhone and Android By Mihi The EID is the 32-digit serial number of your phone's eSIM chip. What it does, how to find it in seconds, how… Read post eSIM Basics · 15 min read What Is an ICCID Number? Meaning, Format, and Where to Find It By Mihi The ICCID is the unique 19-20 digit serial number of your SIM or eSIM profile. What each digit means, how it differs… Read post How-to & Troubleshooting · 10 min read How Long Does It Take to Activate an eSIM? Real Timelines By Mihi Most eSIMs activate in 1 to 5 minutes; travel eSIMs often under a minute. The two steps of activation, timing by scenario,… Read post International Roaming · 21 min read What Is Data Roaming? 2026 Costs and Cheaper Alternatives By Mihi Data roaming means using mobile data on a foreign partner network, at up to $10 per MB. How it works, 2026 costs… Read post eSIM Basics · 12 min read eSIM Disadvantages: Real Limitations, Myths, and Fixes By Mihi The honest downsides of eSIM: device support, slow transfers, harder troubleshooting, software dependency. Plus the myths (battery, speed, security) and how to… Read post Mobile Internet · 14 min read What Do Internet Speeds Really Mean? Mbps, 4G & 5G for Travelers By Mihi Internet speed is measured in Mbps, and travelers need less than they think: 5 Mbps for the essentials, 25+ only for heavy… Read post Travel eSIM Plans · 17 min read Fair Usage Policy on Unlimited eSIMs: Daily Caps & Throttling By Mihi What a Fair Usage Policy really means on unlimited eSIMs: daily high-speed allowances, what throttled speeds still handle, and how to read… Read post How-to & Troubleshooting · 9 min read How to Buy an eSIM Online: A Simple Guide for Travelers By Mihi Buying an eSIM is a five-minute online purchase: choose a plan, pay, get a QR code by email. How to buy, where… Read post