eSIM vs Roaming: How Much Are You Actually Wasting?
My mate Tom came back from two weeks in Croatia with a $340 roaming bill from Telstra. He thought his "international add-on" covered him. It covered 200MB per day. He blew through that by lunch on day one and didn't realise the overage charges until he got home.
Three hundred and forty dollars. For phone data. On a holiday.
I spent the same two weeks in Croatia paying $29 total for 20GB of data through my GOAN eSIM. Same country, same networks, same towers. One hundred percent of the coverage, three percent of the price.
The carrier roaming model is one of the biggest consumer ripoffs that still exists in 2026. Let me show you the actual numbers.
What Carriers Actually Charge for Roaming
I surveyed 8 major carriers across Australia, the US, and the UK. Here's what they charge for using your phone abroad:
Australian Carriers
| Carrier | Daily Rate | Data/Day | 14-Day Cost | 14-Day Data |
|---|---|---|---|---|
| Telstra | $10 AUD | 200MB | $140 AUD | 2.8GB |
| Optus | $5 AUD | 500MB | $70 AUD | 7GB |
| Vodafone AU | $5 AUD | Included (up to 5GB plan cap) | $70 AUD | 5GB max |
US Carriers
| Carrier | Daily Rate | Data/Day | 14-Day Cost | 14-Day Data |
|---|---|---|---|---|
| AT&T | $10 USD | Varies | $140 USD | Limited |
| Verizon | $10 USD | 500MB | $140 USD | 7GB |
| T-Mobile | $0 (some plans) | 5-15GB included | Free-$70 USD | 5-15GB |
UK Carriers
| Carrier | Daily Rate | Data/Day | 14-Day Cost | 14-Day Data |
|---|---|---|---|---|
| EE | $3.62 (£2/day EU) | Uses plan data | $51 (£28) | Plan dependent |
| Three | Free (EU) | 12GB fair use | Free | 12GB |
| Vodafone UK | $3.62 (£2/day EU) | Uses plan data | $51 (£28) | Plan dependent |
UK carriers got better after Brexit forced them to add EU roaming fees (some still include it free). Australian and US carriers are still highway robbery.
Now Compare That to an eSIM
| eSIM Provider | 14-Day Data | Total Cost | Per GB |
|---|---|---|---|
| GOAN | 20GB | $29 USD | $1.45 |
| Airalo | 10GB | $26 USD | $2.60 |
| Holafly | "Unlimited" (throttled) | $44 USD | N/A |
Let that sink in.
Telstra charges $140 AUD (~$90 USD) for 2.8GB. GOAN charges $29 USD for 20GB. That's 7x more data for a third of the price.
Even the "best" carrier deal (Three UK's free EU roaming) caps you at 12GB with fair use limits. GOAN gives you 20GB in 105+ countries with no throttling.
Real Roaming Horror Stories
I've been collecting these from friends and hostel conversations. Every traveller has one.
Tom (Australia > Croatia): $340 AUD Two weeks. Thought his Telstra add-on covered him. It covered 200MB/day. He was streaming music, posting photos, and using maps. Classic overage scenario.
Sarah (US > Japan): $220 USD Ten days in Tokyo and Kyoto. AT&T's international day pass at $10/day plus accidental data usage when she forgot to activate the pass one morning. That single morning cost her an extra $80 in per-MB charges.
Alex (UK > Switzerland): $95 GBP A weekend trip to Zurich. His EE plan included EU roaming, but Switzerland isn't in the EU. He didn't know this. Three days of roaming at non-EU rates.
That Switzerland trap catches so many people. Same with Turkey, Albania, Montenegro, and other popular European destinations that aren't EU. Check the GOAN coverage map because it includes all of these countries on the same plan.
My mum (Australia > UK): $180 AUD She went to London for a week to visit family. Didn't think about data at all. Left her phone on with roaming active. $180 for what turned out to be about 500MB of background app updates and email syncing. She'd barely used her phone.
This one kills me because background data is the silent killer. Your phone doesn't stop downloading things just because you left Australia. App updates, email sync, iCloud photos, everything runs in the background and costs $10+ per megabyte at roaming rates.
The Per-Gigabyte Comparison
This is where it gets embarrassing for carriers:
| Provider | Per GB Cost |
|---|---|
| Telstra roaming | $50.00 AUD |
| AT&T roaming | $20.00 USD |
| Optus roaming | $10.00 AUD |
| Airalo eSIM | $2.60 USD |
| GOAN eSIM | $1.45 USD |
Telstra charges 34x more per gigabyte than GOAN. Not 34% more. 34 times more. That's not a pricing difference. That's a pricing scandal.
Why Carriers Get Away With It
Three reasons:
1. People don't know alternatives exist. Until eSIMs became mainstream, your only options were carrier roaming, pocket Wi-Fi rentals, or buying local SIM cards. Most people defaulted to their carrier because it required zero effort.
2. Automatic activation. Roaming turns on automatically when you land. Your carrier doesn't ask "would you like to pay $10/day for 200MB?" It just starts charging. By the time you notice, you've already spent $30-50.
3. Confusing pricing. Carriers bury roaming rates in dense T&C documents. "Included data while roaming" might mean 200MB/day or it might mean your regular plan data at a $5/day access fee. Good luck figuring out which before your flight.
How to Stop Paying Roaming Charges (Forever)
Before your trip: Get an eSIM. I use GOAN. $29 for 20GB across 105+ countries. Set it up from home.
Turn off carrier roaming. Go to Settings > Mobile Data > your home SIM > turn off Data Roaming. This prevents your carrier from charging you for background data.
Set your eSIM as the default data line. Keep your home SIM active for calls and texts but route all data through the eSIM.
Download offline maps. Just in case. Belt and suspenders.
Tell your carrier you're travelling. Some carriers auto-activate travel packs if they detect roaming. Call them and say you don't want any international add-ons. You've got your own solution.
The setup process takes 60 seconds. One scan, done. When you land, your data goes through the eSIM at $1.45/GB instead of through your carrier at $10-50/GB.
The Annual Savings
If you travel internationally 3-4 times per year (which most working professionals do), here's what you save:
| Scenario | Carrier Roaming (Annual) | GOAN eSIM (Annual) | Savings |
|---|---|---|---|
| 4 trips, 7 days each | $280-560 | $58-116 | $164-444 |
| 2 trips, 14 days each | $280-560 | $58 | $222-502 |
| Full-time nomad (12 months) | $1,800-3,600 | $348 | $1,452-3,252 |
For full-time nomads like me, the savings are over $1,500 per year. That's a month's rent in Da Nang. Funded entirely by not giving Telstra my money.
What About Wi-Fi Only?
Some people say "I'll just turn off data and use Wi-Fi only."
I tried this for my first trip. Here's what happens:
- You walk 20 minutes in the wrong direction because you couldn't check Maps
- You overpay for a taxi because you couldn't check the Grab price
- You eat at a tourist trap because you couldn't check reviews
- You miss a message from your Airbnb host because the cafe Wi-Fi was too slow
- You feel genuinely vulnerable when you're lost at night with no connection
Wi-Fi only isn't a strategy. It's a compromise that costs you in time, money, safety, and experience. The $29 for an eSIM pays for itself on day one.
For a deeper look at what eSIMs are and how they compare to physical SIM cards, check out my eSIM explainer and eSIM vs SIM card comparison.
