Short answer: Yes — 5G is available in Sri Lanka, but mainly as operator trial / limited rollout in selected areas rather than full nationwide coverage.

Details:

• SLT‑Mobitel and Dialog Axiata have been operating 5G trial / 5G‑ready networks and expanding trial zones in multiple cities (Colombo, Kandy, Jaffna, Anuradhapura, Galle and others) and have run demonstrations of very high speeds in 2024–2025. (5g.SLTMobitel.lk)
• Dialog reported a large 5G trial footprint, device launches tied to its 5G service and demo speeds (including record download demos) in 2025, and stated plans for commercial 5G expansion. (dialog.lk)
• SLT‑Mobitel has run 5G and 5G‑Advanced trials (including multi‑Gbps demonstrations) and publishes 5G experience centre locations where compatible phones can access 5G. (mobitel.lk)

What that means for you:

• If you’re in Sri Lanka and have a 5G‑capable phone, you may be able to access 5G in selected trial/coverage zones from the major operators (check SLT‑Mobitel, Dialog or other local providers). Coverage is not yet the same as mature nationwide 5G in larger markets — availability depends on operator rollouts and exact location. (5g.SLTMobitel.lk)

If you want, tell me which city/town in Sri Lanka you’re interested in and I’ll check the latest operator coverage maps and instructions for getting on 5G there.