eSIM Providers for Guernsey (2026) — 5 Compared

We score each provider on five weighted dimensions for Guernsey: Pricing Tiers (20%) — per-GB cost and plan range; Coverage Breadth (20%) — carrier routing quality and 4G LTE network reach via Sure; Network Generation (20%) — which technologies the local network carries; App Features (20%) — installation flow and eSIM management; Support Channels (20%) — which channels exist and how long the refund window runs. HelloRoam, Airalo, Holafly, Saily, and Nomad are scored independently for each destination. The same provider can rank differently for Guernsey versus other countries depending on local carrier partnerships and pricing.

Airalo leads on coverage breadth for Guernsey with a 4.9/5 on the rubric coverage score and 200+ country network footprint. Coverage routes through Sure. For Guernsey specifically, all five providers access the same 4G LTE infrastructure, so urban coverage is comparable between them. Airalo's coverage advantage matters most for multi-country itineraries extending beyond Guernsey — Holafly, Saily, and Nomad score equally for single-country trips.

The comparison matrix evaluates five dimensions: (1) Pricing — entry price, per-GB rate at each tier, and whether unlimited daily is available for Guernsey; (2) Coverage — which local carriers each provider routes through and 4G LTE network quality; (3) Network — which generations the local carriers run, and where each is available; (4) App quality — eSIM installation flow and APN auto-configuration; (5) Refund policy — Holafly offers 180 days, Saily and Nomad 30 days, Airalo 14 days. All five scores combine into the overall ranking for Guernsey.

Most travelers to Guernsey use 1-2GB per day on cellular. Maps, messaging, and social media consume 500MB-1GB daily. Streaming video pushes usage to 3-5GB per day. For a 7-day trip with moderate WiFi availability, a 5GB fixed plan covers light-to-moderate usage comfortably. Heavy users should consider Holafly's unlimited daily plan at $3.49/day. WiFi at hotels and cafes in Guernsey reduces cellular consumption by 30-60% depending on usage patterns.

Airalo supports in-app top-ups for Guernsey — purchase additional data without installing a new eSIM. Holafly's unlimited plan eliminates top-up need entirely. Saily requires a new eSIM purchase for more data. Nomad also requires a separate purchase. Top-ups need an internet connection: WiFi (moderate availability in Guernsey) or remaining cellular data. Buy top-ups before your current plan runs out to avoid being offline in Guernsey while trying to purchase more data.

Install your Guernsey eSIM 24-48 hours before departure while you have stable WiFi. Do not enable data roaming until you land. Most providers start the plan validity clock at first data use, not at installation. Airalo and Holafly both confirm this policy for Guernsey. Saily and Nomad start validity on first connection. Install early to troubleshoot any QR scanning issues while you still have home internet. Enable data roaming in Guernsey only after landing and clearing customs.

Dual SIM configuration for Guernsey: install the travel eSIM, then go to Cellular/SIM settings. Set the eSIM as "Mobile Data." Set your home SIM as "Default Voice." Disable Data Roaming on the home SIM — this prevents carrier roaming charges. Enable Data Roaming on the Guernsey eSIM to connect on arrival. iPhone supports this natively from iPhone XS onward. Samsung, Google Pixel, and OnePlus support it on most recent models. All five eSIM providers (HelloRoam, Airalo, Holafly, Saily, Nomad) function alongside a physical SIM.

EU roaming rules apply within EU member states for European carrier customers. If Guernsey is in the EU, travelers on EU carrier plans use their home data allowance without extra charges — but fair-use policies limit daily volume and speed. A travel eSIM from HelloRoam, Airalo, Holafly, Saily, or Nomad delivers full local speeds without the EU fair-use cap and is the better choice for trips over 5 days or heavy data users burning 3+ GB per day.

Guernsey travel eSIMs run on 4G LTE. All five providers — HelloRoam, Airalo, Holafly, Saily, Nomad — access the same Sure infrastructure, so the network is the same whichever one you buy. Peak-hour slowdowns affect all providers equally in dense urban areas. We publish no speed measurements, because we do not measure anyone's network.

For Guernsey, the five providers split into clear use cases. Airalo scores highest for multi-country itineraries — 200+ destinations on a single account. Holafly scores highest on unlimited daily data if you stream or work remotely. Saily scores highest on privacy with built-in VPN protection (NordVPN infrastructure) at no extra cost. Nomad has the lowest per-GB price if cost is the deciding factor, starting from $5.04 for 1GB. Fixed data plans suit trips under 14 days; unlimited daily makes sense when you burn 5+ GB per day.

Guernsey eSIM prices range from $5.04 for 1GB (entry level) to $60.83 for 20GB (largest fixed plan). Unlimited daily data is available from $3.49/day. The lowest per-GB rate is $3.04 on the highest-volume fixed tier. All five providers — HelloRoam, Airalo, Holafly, Saily, Nomad — offer Guernsey plans with pricing set by their individual margin structures on the same Sure carrier infrastructure.

You can switch providers during your Guernsey trip by purchasing and installing a new eSIM. WiFi is required to download the new profile. iPhone 13+ supports multiple eSIM profiles — install the new one alongside the old. Older iPhones need to delete the current eSIM first. Android varies by manufacturer. Refund windows: Holafly 180 days, Saily 30 days, Nomad 30 days, Airalo 14 days — unused data on the old plan may qualify for a refund. Switching takes 5-10 minutes on WiFi.

Refund policies differ across the five providers for Guernsey plans. Holafly offers the most generous policy: 180 days to request a refund on unused plans. Saily and Nomad both offer 30-day refund windows for unused eSIM profiles. Airalo provides a 14-day refund period. All five require the plan to be unused — no data consumed — to qualify. If you have already activated and used data in Guernsey, refunds are at provider discretion.

eSIM transfer between devices depends on the provider, not the country. Airalo supports re-downloading an unactivated eSIM profile on a new device. Holafly, Saily, and Nomad generally allow one installation per purchase — contact support before activating on the new device. Apple's eSIM Transfer feature (iPhone-to-iPhone via cable or iCloud) does not apply to third-party travel eSIMs. Always install your Guernsey eSIM before factory-resetting or trading in your phone.