Best eSIM for Phnom Penh in 2026
— Ranked by Real Performance

Phnom Penh sits on Cambodia's two dominant 4G LTE networks — Cellcard and Smart Axiata — with Smart Axiata's infrastructure (backed by Axiata Group's regional buildout) delivering the most consistent speeds across the city's central districts, riverfront, and Toul Kork. Coverage is genuinely solid for a Southeast Asian capital of this size, though rural fringe areas toward Sen Sok and beyond drop to patchy 3G. Travellers doing business in the BKK1 or Daun Penh corridors will find speeds comparable to mid-tier European cities, making this a workable destination for remote workers — provided they pick an eSIM that routes via the right local partner.

• →Smart Axiata holds approximately 35% of Cambodia's mobile subscriber base and operates the most extensive 4G LTE footprint in Phnom Penh, with reported peak downlink speeds of 40–60 Mbps in central districts under normal load conditions.
• →Cellcard (formerly Hello Axiata, now independently operated) provides meaningful redundancy across Phnom Penh's urban core but has materially weaker indoor penetration in high-rise buildings compared to Smart Axiata — a known pain point in newer riverside condominiums.
• →Cambodia has no commercial 5G network as of mid-2025; all tourist and MVNO eSIM plans operate on 4G LTE only, meaning there is no speed advantage to paying for a '5G-capable' global eSIM plan here.
• →Most consumer eSIM providers serving Cambodia route wholesale data through a Singapore-based IP transit hub, which adds a consistent 18–25ms of latency to European and North American browsing sessions — relevant if you're doing VoIP calls or video conferencing from Phnom Penh.