What "unlimited" actually means
It does not mean unlimited fast data — almost nowhere does. It means the connection never stops. Understanding the difference is the whole decision.
A daily allowance, then a slower lane
An unlimited plan gives you a set amount of full-speed data every day — on SimWay that runs from 500 MB to 10 GB a day depending on the plan. Use it up and nothing is cut off: the connection drops to a reduced speed for the rest of that day, and the full allowance returns the next day. So you are never stranded without data, which is the actual promise. What you are not buying is an unmetered fast connection.
How slow is the slow lane?
Between 128 Kbps and 1 Mbps depending on the destination, and the figure is printed on every plan card before you pay. At the top of that range video calls and standard-definition streaming still work. At the bottom you have maps, messaging, email, boarding passes and web pages that load without hurry — enough to travel on, not enough to watch anything. It is worth reading the number rather than assuming, because the gap between 128 Kbps and 1 Mbps is the difference between "a bit slow" and "text only".
When the day resets
Twenty-four hours after the eSIM first connects at your destination, and every twenty-four hours after that. Some carriers reset at local midnight instead. Either way the clock starts on first connection, not at purchase — so buying a week before you fly costs you nothing, and installing early is still the right move.
Unlimited or a fixed bundle?
A fixed bundle is cheaper per gigabyte and it is the right choice when you know roughly what you use — most people navigating, messaging and checking things get through a week on a few gigabytes. Unlimited earns its price when your usage is unpredictable or heavy: tethering a laptop, working from the road, a long trip where running out mid-way would be genuinely disruptive. The honest test is what happens if you misjudge. On a bundle you buy a second plan; on an unlimited plan you spend the evening at a slower speed.
Choose the number of days before you pay
This is the one irreversible part. An unlimited plan runs for a fixed number of days chosen at purchase — we sell 7, 15 and 30 — and it cannot be extended once it is running, because our supplier offers no top-up for them. If the trip might stretch, take the longer plan up front: the per-day price falls as the period grows, so a longer plan is rarely as expensive as it looks, and buying a second one mid-trip means a second profile to install.
What it does not change
Unlimited plans are data-only like every other plan we sell: no phone number, no calls, no SMS. Your own SIM stays in the phone for those. Tethering is allowed, and it draws from the same daily allowance — a laptop will reach the slow lane far quicker than a phone will. And the validity period, as above, starts when the eSIM first connects at your destination.