1
The 6:15 AM touchdown
The wheels hit the rainy tarmac at Heathrow at 6:15 AM after an eight-hour flight from New York. You know the drill: barely slept, stiff neck, blinding cabin lights, and fifty people standing before the seatbelt sign dings.
My first reflex, like everyone’s: pull out the phone and switch off Airplane Mode.
Searching… No Service
Then the buzz. A text from my US carrier:
US carrier
“Welcome to the United Kingdom! Your International Day Pass is active. You will be charged $12.00 today. Each additional 24- hour period is $12.00.”
6:16 AM
2
The curbside breakdown
On past trips I’d have just paid it. $12 a day sounds fine when you’re tired, until you realize 10 days adds $120 to your bill. For my partner and me, $240 to use phones we already own.
And many passes slow you down after a daily high- speed allowance. Load a map and a few photos, and the rest of the day crawls.
So this time I had a plan: “I’ll use airport Wi-Fi, then grab an Uber.”
Rookie mistake.
The Wi-Fi worked by baggage claim. The moment I rolled through the sliding doors to the pickup curb, in the morning drizzle, it dropped to zero.
My ride app couldn’t find my driver.
My Airbnb host’s lockbox code was stuck in WhatsApp.
No address, no train map.
Just me, my bags, and a curb full of travelers staring at frozen screens.
3
The airport SIM kiosk trap
Back inside, there was a bright SIM kiosk with a line of thirty exhausted tourists. The board read: “Tourist UK SIM: £35 ($45) for 15 GB.” Passport check, paperwork, and a paperclip to pop out my US SIM.
Lose that tiny chip, and your bank codes and two-factor texts stop for the rest of the trip.
I was about to hand over my passport when the traveler behind me, clearly someone who flies every week, tapped my shoulder.
Don’t wait in that line. Your phone already has an eSIM built in. Download Unpack on the terminal Wi-Fi. It takes 60 seconds and costs a buck.
A fellow traveler in the kiosk line
4
What an eSIM actually is (in 30 seconds)
I’d always assumed “eSIM” was something for IT people. He explained it in plain English:
No plastic chip:
iPhones since late 2018 (XS or newer) and most recent Galaxy and Pixel phones have a eSIM built in.
Two lines at once:
Your US SIM stays put, so calls and texts still reach your number.
Unpack just handles data:
Unpack only handles data. Its eSIM connects you to local networks, so you skip carrier roaming. Just keep Data Roaming off on your home line.
5
The 60-second setup
I stepped out of the line, got back on terminal Wi-Fi and opened the App Store.
1- Downloaded Unpack
30 sec
Clean and simple. No forms, no passport scan, no credit check.
2- Picked the UK and claimed the welcome offer
15 sec
1 GB for $1. Paid with Apple Pay.
3- Installed with one tap
15 sec
An iOS “Activate eSIM” prompt appeared. I tapped Continue. Done.
Back out through the sliding doors. Data switched to the new line. Airplane Mode off.
5G · Full bars
WhatsApp buzzed with the lockbox code. My ride app found my pickup spot and a driver three minutes away. I was connected before most of that kiosk line reached the counter.
6
The rest of the trip
For ten days in London and Edinburgh, I never thought about connectivity once:
Maps for hours a day on the Tube andcobblestones.
Rides and trains booked on the go.
Photos and work email without a dropped connection.
Bank codes arrived on my US number, since my main line stayed on.
When my 1 GB ran low after four busy days, the app nudged me. I added 6 GB for $12 and kept moving.
THE 10-DAY TRIP AUDIT
The real math: carrier roaming vs. Unpack eSIM
What my 10-day trip looked like on paper.
Paid $13 total. Saved $136.80, 91% less.
Get 1 GB for $1
HEAD TO HEAD
Carrier pass vs. airport kiosk vs. Unpack eSIM
Price, speed and convenience side by side.
FEATURE
CARRIER PASS
AIRPORT SIM
Unpack eSIM
10-day cost
$120–$150
$35–$55
From $1 for 1 GB
Speed
Slowed aftercap
Varies
Full 5G / LTE
Setup
Automatic
30-min line
60 sec in-app
Keep yournumber
Yes, $12/day
No, SIMremoved
Yes, works withyour home SIM
Auto-renew
Daily
None
None
Refunds
Disputes
None
30-day policy
BEFORE YOU FLY
Set up in under 60 seconds
Do it at home, so you land connected.
01
Download Unpack and pick your country
Choose from 190+ destinations and claim the $1 welcome offer.
02
Install eSIM
Your phone’s eSIM sets itself up. Your home SIM stays on for calls and WhatsApp.
03
Touch down connected
Turn off Airplane Mode and use your Unpack line for data.
THE 5-SECOND COMPATIBILITY TEST
*#06#
Dial it on your Phone keypad. See an EID number? Your phone has a digital SIM. Must be carrier-unlocked.
Apple iPhone
iPhone 16 / 15 / 14 / 13 / 12 / 11 series, XS, XS Max, XR, SE (2nd gen or newer).
Samsung Galaxy
Galaxy S24, S23, S22, S21, S20 series, Note 20, Z Flip and Z Fold.
Google Pixel & others
Pixel 9 to Pixel 3 / 3 XL. Motorola Razr (2019+) and other unlocked flagships.
Your phone must be carrier-unlocked.
DESTINATION RATES
Simple rates in 190+ destinations
No roaming fees, no checkout taxes, no auto- renewals.
Get 1 GB for $1
The 30-day peace-of-mind policy
If your trip is canceled or your phone isn’t compatible before you activate, message us within 30 days for a full refund. 24/7 help in the app.
30 DAYS
Before activation
FULL REFUND
In clear cases
EASY HELP
24/7 in the app
VERIFIED REVIEWS
What travelers say
Real reviews from the App Store and Google Play.
Travel buddy
“From now on this is going to be my go to app for data whenever I travel. Extremely user friendly design and easy to use! Definitely recommend!”
flawsomesofi · App Store
Jun 20, 2026
“I’ve used several eSIM apps while traveling, but Toggle stands out as the best overall. I appreciate its simplicity and straightforwardness. The customer support is also impressive: they respond quickly and are friendly. I’ll definitely be using this app on my travels from now on.”
Maksim Sianko · Google Play
May 8, 2026
Great app!
“Easy to set up and worked instantly when I landed. No hassle, fast connection. Highly recommend for travel.”
erikamg7 · App Store
Feb 9, 2026
Stop paying the $12/day roaming tax.
Download Unpack, claim 1 GB for $1, and land connected.
Get 1 GB for $1
30-day refund policy · 60-second install · 190+ countries · Keep your number
This article is an advertisement paid for by Unpack. Results described may vary by device, destination and network. Prices shown in USD at time of publishing.