Journal
Guides that start from the data
We track thousands of eSIM prices every day. These are the patterns worth knowing before you buy.
eSIM for China: what the firewall actually blocks
An eSIM doesn't bypass China's firewall on its own — it depends on where your traffic leaves the country. Plus what the same 10 GB plan costs at 13 providers.
Read the guide
eSIM South Korea: you need less data than you think
Seoul has some of the densest public Wi-Fi anywhere, which changes the maths. Plus what the same 10 GB plan costs across 14 providers.
eSIM Portugal: who actually needs one (and who doesn't)
Coming from the EU, you probably don't need to buy anything. Coming from the UK, US or Brazil, the maths is completely different.
eSIM Canada: the expensive mistake at the US border
A Canadian plan doesn't cover the US, and vice versa. Plus: the same 10 GB plan ranges from $7 to $64 depending on who sells it.
WhatsApp calls in Dubai: what an eSIM can and can't fix
The UAE blocks VoIP at country level. Half the eSIM industry claims roaming gets around it. The honest answer is that it sometimes does — and you shouldn't plan on it.
eSIM Vietnam: price isn't the problem, the network is
Every plan works in Hanoi. Ha Giang and Phu Quoc are where they separate — and no provider tells you which network you'll land on.