Which carriers matter, what buying a SIM involves, and when an eSIM is the smarter move.
Reliable mobile internet at better prices than most travel eSIMs, with polished iOS and Android apps and support for making and receiving phone calls.
One of the biggest travel eSIM brands, with a very large destination catalog.
Known for unlimited-data plans in many destinations, at a higher price per gigabyte.
Serbia is not in the EU, so EU roam-like-at-home does not apply, but a Serbian SIM does roam at domestic rates across the Western Balkans (Albania, Bosnia and Herzegovina, Kosovo, Montenegro and North Macedonia). The headline data packs have very short validity, 100 GB for 3 days or 75 GB for 5, so match the pack to your trip length rather than the gigabytes. A SIM kept from a previous trip may have been deregistered under the 2025 rule.
The market leader with the largest network, strongest nationwide 4G and expanding 5G.
A solid balance of coverage and simplicity, and a frequent traveler recommendation.
The fastest speeds and the biggest tourist data allowances, including a visitor-focused Welcome SIM. All three networks are close enough that the plan matters more than the carrier.
Registration has been mandatory for all new and existing SIMs since February 2025, a recent change that many older guides miss. Bring your passport: the seller scans it at activation and the SIM is live within minutes. The rule applies at airport kiosks too.
Airport counters charge more than city stores, though by how much is unclear. They can also close late at night, worth knowing if you land on an evening flight.
Guac eSIM covers Serbia with data plans starting from $1.50 per GB and instant activation, so your phone is online the moment you land. Airalo and Holafly are popular alternatives.
SIM cards and eSIM in Serbia