A guide to eSIM data plans - how they work, the routing transparency problem most providers hide, and what to look for.
An eSIM (embedded SIM) is a digital SIM that lets you activate a cellular plan without a physical card. Download a profile, scan a QR code, and you're connected.
Traditional SIM: Buy card → Insert → Activate → Wait
eSIM: Purchase → Scan QR → Connected in seconds
Most modern phones support eSIM - iPhone XS and later, Google Pixel 3 and later, Samsung Galaxy S20 and later, and many other Android devices, tablets, and laptops. Most devices can store several eSIM profiles, so you can keep your primary number active and switch data plans by location.
Here's what eSIM marketing says: "Local data in 190+ countries."
Here's what often happens: Your traffic routes through Hong Kong, the UK, or Singapore - regardless of where you are.
What you expect:
Phone in UK → UK carrier → UK IP → Internet
What often happens:
Phone in UK → UK carrier → Routed to Singapore → Singapore IP → Internet
This matters because:
- Your IP doesn't match your location - triggers security checks, wrong regional content, blocked banking apps
- Added latency - extra hops mean slower connections
- Jurisdiction issues - your traffic passes through countries you didn't choose
Most providers don't publish routing details. It's complex, it changes, and most customers don't ask.
If you're using an eSIM and want to verify where your traffic actually goes:
# Check your public IP location
curl -s ipinfo.io/json | jq '{ip, city, country, org}'
# Compare to your device timezone
date +%Z
# Trace the route
traceroute 8.8.8.8If your IP says Ireland but your timezone says London, you've got hub routing. No terminal? voidmob.com/tools/ip-checker shows the same thing in a browser.
Traffic exits to the internet in your physical location. You get a local IP, local latency, everything works as expected.
Pros: Correct geolocation, lower latency, no platform trust issues
Traffic routes back through a central hub (often Europe or Asia) regardless of where you connect.
Pros: Cheaper for the provider to operate Cons: Wrong IP location, added latency, potential platform issues
Some providers include VPN access to "fix" the routing problem. You control your apparent location regardless of actual routing.
Pros: User has control Cons: Extra battery drain, another app to manage, doesn't solve the underlying issue
Do they publish where your traffic terminates, per plan, before you pay? If they don't mention it, assume hub routing.
Can you get an IP that matches your physical location? Important for banking apps, streaming, business tools.
Should be instant - QR code delivered immediately after purchase, active in seconds.
"190+ countries" means nothing if quality varies wildly. Check the specific countries you need, and whether regional bundles cover your whole trip.
Can you add data to an active eSIM without installing a new profile?
KYC requirements, payment options, data retention policies.
| Factor | Most Providers | Transparent Providers |
|---|---|---|
| Routing details | Hidden | Published per plan |
| IP location | Often mismatched | Local options available |
| KYC required | Usually | No |
| Crypto payments | Rarely | Yes |
| Activation | Minutes to hours | Instant |
VoidMob eSIM publishes routing for every plan:
- See routing before purchase - Every plan shows the country where your traffic exits. Plans without verified routing are not listed.
- Local IP options - Get IPs that match your actual location, depending on destination
- 180+ destinations - Single-country, regional, and global plans
- Instant activation - QR code delivered immediately, top-ups on eligible plans without a new profile
- No KYC - Sign up with a crypto wallet or just an email, pay with BTC, ETH, USDT, SOL, and more
- API and MCP - Buy, check status, and top up through the REST API or the open-source
@voidmob/mcpserver
Plans by destination: voidmob.com/esim/locations · Docs: voidmob.com/docs/esim · Estimate what you need: eSIM Roaming Calculator
- eSIM IP Routing: The Hidden Problem With "Local" Plans
- How Anonymous Is Your eSIM?
- No-KYC eSIM Providers Compared
Maintained by VoidMob - eSIM connectivity with transparent routing.