Flowsus Help Center
How can we help?
Getting started with eSIM
What to know before you purchase or install.
What Is an eSIM and How Does It Work?
Learn what an eSIM is, how travel eSIM data plans work, when they activate, and what to check before installing one on your phone.
How to Check If Your Phone Supports eSIM
Check eSIM compatibility and carrier-unlock status on iPhone, Samsung Galaxy, and Google Pixel before buying a travel data plan.
How to Install an eSIM on iPhone, Android, and Other Devices
Install a travel eSIM with a QR code or manual details on iPhone, Android, iPad, tablets, and other eSIM-capable devices; then get connected and troubleshoot common issues.
No Internet After Installing an eSIM? Turn On Data Roaming
If the travel eSIM is installed but has no internet, enable data roaming on that line, set it as the default data SIM, and keep roaming off on your home SIM.
Japan eSIM With a Phone Number: What to Check
Understand data-only Japan eSIMs, phone numbers, WhatsApp, regular calls, SMS and verification before choosing a travel plan.
Choosing a data plan
Plan the right amount of data for your trip.
How Much Mobile Data Do You Need for Travel?
Estimate travel data for maps, messaging, social media, video, remote work, and hotspot use, then choose an eSIM allowance that fits.
Japan eSIM: Unlimited Data or Fixed Data?
Compare unlimited and fixed-data eSIM plans for Japan, including trip length, everyday usage, hotspot needs and the plan details to check before buying.
How Much Data Do You Need for Japan?
Estimate mobile data for maps, messaging, social media, video and hotspot use in Japan, then match the estimate to a current eSIM plan.
Try another country, region, plan name, or data amount.
Not sure about something?
How can we help?
Include enough detail for the support team to investigate your request.