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Getting started

guides & how‑to troubleshooting 80 articles
  • What is Openline?
    Openline is a global travel eSIM. You buy a data plan in seconds, install it on your phone, and use mobile internet in 190+ countries…
    Getting started
  • How Openline works
    Openline uses eSIM technology — a small chip already built into your phone that can hold multiple mobile line profiles.
    Getting started
  • Openline vs local SIM cards
    Local SIMs can sometimes be cheaper for long stays in one country. Openline wins on convenience, multi-country trips, and keeping your home…
    Getting started
  • Openline vs traditional roaming
    Traditional roaming means your home carrier charges you (often heavily) to use its partners abroad.
    Getting started
  • How to buy your first Openline eSIM
    Buying an Openline eSIM is a two-step story: pay → purchase code, then redeem code → eSIM profile.
    Getting started
  • Do I need an account to buy an Openline eSIM?
    No — you can buy and redeem completely without an account. 1. Pay as guest at openline.com with just an email address. 2.
    Getting started
  • When does my Openline plan start?
    Your plan starts the moment your Openline eSIM first connects to a supported mobile network in a supported country.
    Getting started
  • How do I activate my Openline eSIM once I land?
    Activation happens automatically the first time your Openline line finds a partner network — usually within 30–90 seconds of turning…
    Getting started
  • Can I install my Openline eSIM before I travel?
    Yes, and you should. Installing at home on your own broadband is the single most reliable install path.
    Getting started
  • Why is Openline different from Airalo, Holafly, Saily, and Roamify?
    All four are established travel eSIM brands. Openline overlaps on the basics — you buy a plan, install it on your phone, and use local…
    Getting started
  • Is Openline really cheaper than the competition?
    For most destinations and most plan sizes: yes. Our pricing is dynamic — we shop Tier-1 wholesale continuously and pass the savings to the…
    Getting started
  • What is an eSIM?
    An eSIM (embedded SIM) is a small chip built into your phone that can hold digital SIM profiles.
    Getting started
  • Is an eSIM better than a physical SIM?
    For travel, yes. You can buy from anywhere, install in seconds, switch between plans, and keep multiple profiles on the same phone.
    Getting started
  • Can I use Openline as my primary line?
    Yes, technically, but Openline plans are travel-focused (7–30 day durations). You can buy successive plans to stay connected long-term, or…
    Getting started
  • Can I have multiple Openline plans at the same time?
    Yes, and it's a common pattern — e.g. a country plan plus a fallback global plan.
    Getting started
  • Do Openline eSIMs expire if unused?
    Unused eSIMs remain valid until first activation. Plans start counting only after the eSIM first connects at destination.
    Getting started
  • What is an ICCID?
    The ICCID is a 19–20 digit identifier for a specific SIM profile. It's how we identify your specific eSIM in support.
    Getting started
  • What is an SM-DP+?
    SM-DP+ (plan Manager - Data Preparation Plus) is the server that hosts your eSIM profile before you download it.
    Getting started
  • What is an activation code?
    A string that combines the SM-DP+ address and a matching profile code. Enter it in Add eSIM → Enter Manually if the QR won't scan.
    Getting started
  • What's the difference between an eSIM and an eUICC?
    eUICC is the underlying hardware standard (the chip itself). eSIM is the everyday name for a profile on that chip.
    Getting started
  • Can I keep my primary number while using Openline?
    Yes. Openline is a second line — your primary SIM stays inserted (or your primary eSIM stays installed) and receives calls/SMS/2FA as…
    Getting started
  • Will my primary number receive calls while I use Openline?
    Yes, if your home line still has signal. Turn off Data Roaming on the home line to avoid roaming charges; SMS and voice will still route…
    Getting started
  • What happens when I return home?
    Just switch Cellular Data back to your home line. The Openline line can stay dormant on the phone; delete it later if you want.
    Getting started
  • How many eSIMs can my phone hold?
    iPhones cache up to 8 eSIM profiles; only 2 can be actively enabled at once (dual-SIM).
    Getting started
  • How do I switch between two eSIMs on iPhone?
    Settings → Cellular → tap the line → toggle Turn On This Line. Set Cellular Data to whichever line you want data on.
    Getting started
  • Do I need to remove my home SIM?
    No. Openline is a second line. Leave your home SIM in — that's what lets you keep your primary number reachable.
    Getting started
  • What countries can I install my Openline eSIM in?
    Anywhere. Installation is a one-time provisioning that only needs Wi-Fi. Activation (connecting to a supported network) is what requires…
    Getting started
  • Does Openline work for very short trips?
    Yes — country plans start at 1 day / 500 MB in some destinations. Perfect for airport layovers and one-day trips.
    Getting started
  • Does Openline work for long-term travel?
    Yes — 30-day plans in every country, plus monthly Unlimited plans for digital nomads. Chain plans as long as you like.
    Getting started
  • Do I need to install anything on my phone?
    No app is required — the eSIM works natively. The Openline app is a convenience for managing plans, but not a requirement to use the…
    Getting started
  • Do I need Wi-Fi to activate the eSIM?
    Install vs activate — these are two different things and only one needs Wi-Fi. Adding the Openline profile to your phone is a one-time…
    Getting started
  • Does Openline slow down my phone?
    No. An eSIM is a passive profile; it has no impact on phone performance. Reach Openline support 24/7 through any of these channels: - Live…
    Getting started
  • Does Openline drain my battery faster?
    Marginally, if you have two lines actively scanning. To reduce impact, turn off the line you're not using while at home.
    Getting started
  • Does Openline work without opening any app?
    Yes. Once the eSIM is installed and the line is enabled, it just works — no app to launch.
    Getting started
  • Do I need to keep the Openline app installed?
    Only if you want in-app management (buy, top up, chat). Once the eSIM is on your phone, the service works whether the app is installed or…
    Getting started
  • Openline vs Airalo
    Airalo is a marketplace of many small eSIM plans. Openline runs its own core network across all partners for uniform pricing and one flat…
    Getting started
  • Openline vs Holafly
    Holafly focuses on unlimited data plans per country. Openline offers both metered and unlimited plans with multi-country regional bundles.
    Getting started
  • Openline vs Saily
    Saily is a NordVPN-owned travel eSIM launched in 2024. Both Saily and Openline are travel eSIMs — the practical experience of buying and…
    Getting started
  • Openline vs Nomad
    Nomad is a Singapore-based travel eSIM. Openline offers comparable coverage with US-based support presence.
    Getting started
  • Openline vs Ubigi
    Ubigi is operated by Transatel (NTT). Openline is independent, focused on transparent flat pricing.
    Getting started
  • Openline vs GigSky
    GigSky is one of the earliest travel eSIM providers. Openline offers newer plans and multi-payment support including crypto.
    Getting started
  • Openline vs Truphone
    Truphone is a business-focused eSIM operator now part of Monogoto. Both Truphone and Openline are travel eSIMs — the practical experience…
    Getting started
  • Openline vs Jetpac
    Jetpac is a Singapore-based travel eSIM with a lounge-access bundle. Both Jetpac and Openline are travel eSIMs — the practical experience…
    Getting started
  • Openline vs Roamify
    Roamify is a travel eSIM aggregator. Both Roamify and Openline are travel eSIMs — the practical experience of buying and installing a plan…
    Getting started
  • Openline vs aloSIM
    aloSIM is a mid-size travel eSIM. Openline offers uniform pricing across all regions.
    Getting started
  • Openline vs Instabridge
    Instabridge is a travel eSIM originally built on top of a public Wi-Fi app. Both Instabridge and Openline are travel eSIMs — the practical…
    Getting started
  • Openline vs MobiMatter
    MobiMatter aggregates many eSIM providers. Openline is a first-party operator. - You want flat, transparent pricing across every country.
    Getting started
  • Openline vs Yesim
    Yesim is a Georgia-based eSIM reseller. Openline is a facilities-based operator with its own core.
    Getting started
  • Openline vs BNESIM
    BNESIM is an established international eSIM and calling provider. Both BNESIM and Openline are travel eSIMs — the practical experience of…
    Getting started
  • Openline vs Firsty
    Firsty is a free-tier travel eSIM with paid upgrades. Both Firsty and Openline are travel eSIMs — the practical experience of buying and…
    Getting started
  • How is Openline different from Airalo?
    Airalo is an eSIM marketplace: they resell profiles from many partners under Airalo branding.
    Getting started
  • How is Openline different from Holafly?
    Holafly emphasises unlimited plans and country-focused branding. Openline shares the unlimited approach but adds multi-Tier-1 routing (so…
    Getting started
  • How is Openline different from Saily?
    Saily is NordVPN's travel eSIM. Openline shares the modern-app philosophy but is independent of any VPN company, focuses on Tier-1…
    Getting started
  • How do I know if my phone supports Openline?
    Almost every phone released after 2019 supports eSIM, and the Openline app runs a full compatibility check the moment you sign up — you…
    Getting started
  • How long does it take to activate an Openline eSIM?
    From "tap to buy" to "connected to the internet" is usually under two minutes on iPhone and under four minutes on Android.
    Getting started
  • What is an Openline purchase code?
    Every Openline purchase produces a purchase code — a short alphanumeric token that looks like OL-4F7X-9K2Q-A3M8.
    Getting started
  • How do I redeem an Openline purchase code?
    You can redeem the code through any of three channels: - In the Openline app — tap Redeem code, paste or scan the code, then install the…
    Getting started
  • Do Openline purchase codes expire?
    No — the code itself never expires. You can buy today and redeem in five years.
    Getting started
  • Where do I find my purchase codes?
    Three places, in order of convenience: - Openline app → My Codes. Every code you've bought under this account or claimed later.
    Getting started
  • Can I redeem an Openline code on a different device than I bought on?
    Yes — the device you buy on and the device you redeem on don't have to match. The code lives on our servers, not on your phone.
    Getting started
  • Can two people share one Openline purchase code?
    No — each purchase code redeems into exactly one eSIM profile on one device. Once redeemed, the code is spent.
    Getting started
  • Can I transfer an unused Openline code to another account?
    Yes — because codes are bearer tokens, "transferring" is really just sharing the code with the new owner and having them redeem it (or…
    Getting started
  • Can I add someone else's purchase code to my Openline account?
    Yes. Sign in at openline.com or in the app, open My Codes, tap Add code, and paste it. From then on the code shows in your account.
    Getting started
  • What if I lose my Openline purchase code?
    As long as you can prove you bought it, we can restore access. 1. Sign in at openline.com with the email you used at checkout.
    Getting started
  • How do I reinstall my Openline eSIM if it disappeared?
    Sign in at openline.com → My Codes → find the plan → Reinstall. This issues a fresh install token from the same underlying purchase code —…
    Getting started
  • Can I move my Openline eSIM to a new phone?
    Yes. Delete the eSIM on the old phone (Settings → Cellular → tap Openline → Delete).
    Getting started
  • My phone factory-reset. How do I get my Openline eSIM back?
    Same reinstall flow. Sign in at openline.com → My Codes → Reinstall. Your purchase codes are permanently tied to your account and survive…
    Getting started
  • I deleted my Openline eSIM by mistake — is it gone?
    No. The purchase code is separate from the installed profile. Sign in at openline.com → My Codes → Reinstall to reinstall the same plan.
    Getting started
  • My purchase code says "already redeemed" but I never installed it
    The code was redeemed on some device. Sign in at openline.com → My Codes to see if the plan is active in your account.
    Getting started
  • Can I reinstall Openline on the same phone multiple times?
    Yes, unlimited. Each Reinstall issues a fresh install token. Useful if the profile got corrupted, if you factory-reset, or if you deleted…
    Getting started
  • What should I do before I leave home to make sure my Openline eSIM works?
    The best-practice pre-travel checklist: 1. Buy your plan at home on your own broadband.
    Getting started
  • How early can I install my Openline eSIM before travel?
    As early as you want. The profile has no expiration on the device — install it a month before, six months before, whenever.
    Getting started
  • Openline vs Truphone / 1GLOBAL
    Truphone was acquired and rebranded 1GLOBAL — enterprise-focused. Openline serves both consumer and enterprise.
    Getting started
  • Openline vs Google Fi
    Google Fi is a US-domestic carrier with international roaming. Openline is a travel-only eSIM — no home-line commitment.
    Getting started
  • Openline vs T-Mobile / AT&T / Verizon international plans
    US carrier international plans charge daily fees. Openline is often 60-80% cheaper for equivalent data.
    Getting started
  • Openline vs Your home carrier's roaming
    Home-carrier roaming is convenient but expensive. Openline is typically 5-10x cheaper for the same data volume.
    Getting started
  • Openline vs Local SIM cards bought at the airport
    Local SIMs are cheap but require ID/KYC in most countries and swapping your physical SIM. Openline avoids both.
    Getting started
  • Openline vs Renting a pocket Wi-Fi hotspot
    Pocket Wi-Fi rentals cost more per day, require charging, and add a device to carry. Openline lives on your phone.
    Getting started
  • Openline vs Just using your hotel Wi-Fi
    Hotel Wi-Fi is unreliable, sometimes hostile to eSIM activation, and dies once you leave. Openline works anywhere the local carriers do.
    Getting started
  • What's the difference between a purchase code and an activation code?
    Two different things, easy to confuse. Here's what each one is, where it comes from, and what you do with it.
    Getting started

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Still stuck?

Reach Openline support 24/7 through the channel that suits you. Include your purchase code (the OL-… code we emailed you) and, if the eSIM is already installed, its ICCID — that's enough for us to find your plan and diagnose without back-and-forth.

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