Before you start

An unlocked phone — eSIM is supported by all three operators
For registration: a passport, or your residence permit; Ukrainian passport holders can also register through Diia or BankID
Cash or a card; SIMs are sold everywhere including supermarkets

Step-by-step

1
Buy a SIM on arrival
Operator shops in Kyiv are dense — every mall and most metro exits have one — and supermarkets sell starter packs. Ask for a tariff with a large data allowance rather than minutes; Ukraine's data prices are among the lowest in Europe and almost all communication here is over messengers rather than voice.
In personWho: YouTen minutesStarter packs are inexpensive; unlimited-ish monthly bundles are typically a few hundred hryvnia
2
Register the number to your document
Do this at an operator shop with your passport or residence permit, or online where the operator supports it — Vodafone offers online registration with Mobile ID or an electronic signature, lifecell calls the process personification, and Kyivstar allows registration in shop with a Ukrainian passport or an international passport. It is not a legal obligation; it is what makes the number yours rather than a disposable object.
In personWho: YouFifteen minutesFree
3
Install the apps the city runs on
Kyiv Digital for transport tickets, alerts and shelter maps; Повітряна тривога for alerts; Diia for government services; your bank's app; and Bolt or Uklon for taxis. Kyiv Digital in particular is not optional — it is where the transport packages that cut the ₴30 fare to about ₴23 are bought.
Mobile appWho: YouAn evening
4
Plan for the power, not the coverage
During scheduled outages, mobile base stations run on backup power and coverage thins as the hours pass. Carry a large power bank, keep a second SIM on a different operator if you depend on connectivity for work, and note which cafés advertise both power and Starlink. Home fibre goes down with the building's power unless the router is on a UPS — a ₴2,000 UPS is the single best connectivity purchase you will make here.
In personWho: YouOne shopping tripA decent power bank and a small UPS, a few thousand hryvnia together

Documents you’ll need

Passport or residence permit, for registration
An unlocked handset, or an eSIM-capable one
Nothing at all, if you only want a working prepaid SIM today

Things most newcomers don’t know

Ukraine does not require you to show a passport to buy and use a prepaid SIM.

It is genuinely unusual and it catches people out in both directions — arrivals expect a bureaucratic ordeal and get none, then discover months later that an unregistered number cannot be recovered after a theft. Register voluntarily.

Source: Kyivstar / Vodafone / lifecell registration pages

Kyivstar allows a maximum of ten numbers registered per document.

Relevant if you are setting up a team, a household or devices; the cap is on the document, not the person's intent.

Source: Kyivstar

Connectivity in Kyiv is a power problem, not a network problem.

The masts are modern and the data is cheap. What takes you offline is a scheduled outage draining base-station batteries and killing your building's router. A UPS on the router and a big power bank solve 90% of it.

Source: community-reported

Common mistakes to avoid

Not registering the number, then losing the phone. There is no route back to a number that was never linked to a document.
Buying a tariff sold on call minutes. Almost nobody here calls; buy data.
Assuming home internet survives a blackout. It survives exactly as long as the router's power source does.
Relying on a single operator for work-critical connectivity during outage season.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.