What is roaming and how does it work with Holafly's eSIM?
Data roaming is an agreement between operators that allows you to use mobile internet outside your country by connecting to a local network. Holafly doesn't eliminate this concept: it replaces it with a prepaid data plan on an eSIM that you install before traveling and activate upon arrival at your destination, without a physical card or contract with your operator.
The practical difference is this: with traditional roaming from your home operator, you remain under their contract and data plan (sometimes with per-MB charges). With a travel eSIM like Holafly's, you pre-purchase an independent data plan that runs on an associated local network, and your main line remains inactive while you use the eSIM. Technically, it's still "roaming" from your phone's perspective — which is why the operating system asks you to activate data roaming just as if you were using your usual SIM — but the operator billing you is no longer your home country's.
How Holafly's roaming works step by step
According to Holafly's setup guide (esim.holafly.com, accessed August 3, 2026), the process has two distinct stages: installing the eSIM (can be done before traveling, with Wi-Fi) and activating it (done at the destination, when the phone first searches for the local network). Confusing these two stages is a common source of questions.
| Step | iPhone | Android |
|---|---|---|
| 1. Install (before traveling) | Settings → Cellular Data → Add eSIM → Use QR Code | Settings → Connections → SIM manager → Add eSIM → Scan QR code |
| 2. Choose data line | Settings → Cellular Data → select travel eSIM as data line | SIM manager → select eSIM as default mobile data |
| 3. Activate at destination | Settings → Cellular Data → select eSIM → activate Data Roaming | Connections → Mobile data → activate Data Roaming |
The critical point is step 3, and it's only done once you are already in the destination country: if you activate roaming before leaving, the phone won't find the local network yet, and it might seem like the eSIM "doesn't work" when in reality, only that last toggle is missing.
Do I need to activate data roaming for Holafly to work?
Yes. It is a mandatory step, not optional, and it appears as such in the installation instructions published by Holafly (esim.holafly.com, accessed August 3, 2026): without that switch activated on the travel eSIM, the plan you purchased will not connect to any network even if the rest of the installation is correct.
Data roaming is activated on the travel eSIM and only when you are already in the destination country. Not before, and not on your main line.
What often causes confusion is where that switch is activated. Roaming is turned on only for the travel eSIM, never for your main line (the one you use in your home country). If you accidentally activate roaming on your physical home SIM instead of the Holafly eSIM, your local operator might start charging you actual roaming fees on that line while you believe you are browsing with the prepaid plan you purchased. This is how some travelers end up paying twice for the same trip.
What network does Holafly use in Mexico and what coverage does it have?
According to Holafly's product page for Mexico (esim.holafly.com/es/esim-mexico, accessed August 3, 2026), the eSIM uses the Movistar Mexico and Telcel networks, with 5G speeds where available, in addition to 4G and LTE throughout the rest of the country.
The same page acknowledges areas without coverage: Isla Holbox, Isla Contoy, Chiquilá, Ojo de Agua, and some stretches of the Playa del Carmen–Mérida federal highway. If your trip includes any of these points — highly frequented by those traveling to Holbox from Cancun — it's advisable to confirm this before purchasing any eSIM, not just Holafly's, because these are areas where mobile coverage is generally limited.
Common errors when activating eSIM roaming
Activation problems with any travel eSIM — Holafly included — are usually due to a handful of recurring causes. If you have already installed the eSIM and it's not connecting, check in this order:
| Symptom | Probable cause |
|---|---|
| eSIM appears installed but no data | Data roaming specifically on that eSIM is not activated |
| Phone still using data from the main line | Travel eSIM was not set as the default data line |
| No signal at all | Mobile data is disabled at the system level, or the phone is still in airplane mode |
| Unexpected charges on the main line | Roaming was activated on the physical home SIM instead of the travel eSIM |
Many of these cases are resolved by checking the phone's network settings, not by reinstalling the eSIM from scratch. If it still doesn't work after checking this list, the next step is to contact the provider from whom you purchased the plan (below we see what channels each offers).
Are Holafly's "unlimited" data truly unlimited?
With nuances. Holafly's own page for Mexico specifies that their plans apply a "Fair Usage Policy," under which speed may be temporarily reduced during consumption peaks within the same day, then restored the following day. That is to say: "unlimited" in data volume, but not necessarily in sustained speed 24 hours a day.
This is not exclusive to Holafly: it is common for unlimited mobile data plans — whether for travel eSIMs or local operators — to include some type of fair usage policy, because no network has infinite bandwidth. What is relevant when comparing plans is not whether they say "unlimited," but whether they clearly state what happens when that policy is activated.
Traditional roaming vs. travel eSIM: what really changes
It's useful to separate two questions that are often conflated: "what is roaming?" and "should I use my operator's roaming or buy a travel eSIM?". If you want the full technical detail of the first question, we've already covered it in our guide on what roaming is; here we'll stick to what changes in practice.
With roaming from your home operator, you remain under their contract: it might include a data allowance in your plan price (common if you travel within your region) or charge you per MB consumed (common outside regional agreements). With a travel eSIM — whether Holafly, PuraSIM, or any other — you purchase an independent data plan, with a known fixed price beforehand, that doesn't affect your home contract. You can delve deeper into the technical differences between both models in this comparison between eSIM and roaming.
Customer support: what Holafly offers and what alternatives exist
According to Holafly's contact page (esim.holafly.com/contact-us, accessed August 3, 2026), support is offered via live chat, WhatsApp, and email (help@holafly.com), with 24/7 availability. No customer service phone number is published.
This is a point to consider when choosing any travel eSIM: neither Holafly nor most providers of this type of service offer phone support, because the business model is end-to-end digital. PuraSIM, for example, offers 24/7 support in all languages via email and WhatsApp, with the same criterion: digital channels, no phone line.
Objective comparison: Holafly eSIM vs. other travel eSIMs
This table compiles data published by each provider on their official channels, with the consultation date. It does not include prices as they change depending on duration, destination, and purchase time; for updated prices, check each provider's official page.
| Criterion | Holafly | PuraSIM |
|---|---|---|
| Destinations | List of destinations published on its website (esim.holafly.com, accessed Aug. 3, 2026) | More than 200 |
| Customer support | Chat, WhatsApp, and email, 24/7 (esim.holafly.com/contact-us, accessed Aug. 3, 2026) | Email and WhatsApp, 24/7, in all languages |
| Activation | Requires manual data roaming activation at the destination | Activation in approximately 1 minute |
| Time limit to activate after purchase | Not published on the consulted pages | 180 days from purchase |
| Network in Mexico | Movistar Mexico / Telcel (esim.holafly.com/es/esim-mexico, accessed Aug. 3, 2026) | Varies by destination and local associated network |
| "Unlimited" data | Yes, with Fair Usage Policy (temporary throttling at peak times) | Plans by GB and data plans by day depending on destination |
Is your phone eSIM compatible? How to check
Before buying any travel eSIM — whether from Holafly or another provider — confirm that your phone is compatible. Not all models are, and some operators block the function even if the hardware supports it. The most reliable way is to check your phone's settings for the "Add eSIM" or "Add mobile plan" option; if it appears, it is compatible.
We cover the complete list of compatible models, by brand and generation, in this guide to eSIM compatible phones. If this is your first time using this technology, you may also find the explanation of what an eSIM is and the step-by-step installation process helpful before purchasing any plan.
Frequently asked questions
Do I need a physical SIM card to use Holafly roaming?
No. Holafly works exclusively with eSIM: it is installed by scanning a QR code and does not require inserting any physical card or going to a store.
What happens if I activate data roaming on my main SIM instead of the travel eSIM?
You run the risk of your home operator charging you actual roaming fees on that line, while the travel eSIM you purchased remains unused. Roaming should only be activated on the travel eSIM.
Does Holafly's unlimited data have any practical limits?
Yes: they apply a Fair Usage Policy that can temporarily reduce speed during consumption peaks on the same day, according to their own product page.
Does Holafly work throughout the Riviera Maya and Cancun?
Generally, yes, but their own page acknowledges areas without coverage such as Isla Holbox, Isla Contoy, Chiquilá, Ojo de Agua, and some stretches of the Playa del Carmen–Mérida highway. It's advisable to check if your route passes through there.
Can I contact Holafly by phone if I have a problem with roaming?
There is no phone number published on their contact page. Their channels are live chat, WhatsApp, and email, available 24/7.
Do I need to activate data roaming with any travel eSIM, not just with Holafly?
Yes, it's a standard behavior of the phone's operating system (iOS and Android), not something exclusive to one provider: any eSIM that uses networks outside your country will ask to activate that toggle.
Can I have my main SIM and a travel eSIM active at the same time?
Yes, most dual SIM phones allow you to keep both lines installed and choose which one uses mobile data. The important thing is to select the travel eSIM as the default data line while you are at your destination.
Conclusion
Holafly's roaming works like any travel eSIM: you install it before leaving, activate data roaming at your destination (only on the eSIM, never on your main line), and browse on an associated local network — in Mexico, Movistar Mexico and Telcel — with "unlimited" data subject to a fair usage policy. It's a solid system, but the activation step is where first-time travelers often get stuck.
If you're comparing options for your next trip, check verifiable criteria — destinations covered, support channels, time frame to activate the plan after purchase — before deciding based on price or name. You can view PuraSIM's international data plans, with over 200 destinations, activation in approximately 1 minute, and a 180-day activation period from purchase, in our international eSIM collection.
