In summary: the choice between 5G eSIM and 4G eSIM depends on the destination, not the trend: in Japan, South Korea, the United States, or Western Europe, 5G is worth it because the extra cost is small and coverage is solid. In much of Latin America, rural areas, or backpacking routes, 4G LTE is sufficient and also extends mobile battery life.
5G has been promising to revolutionize mobile connectivity for years. But when you travel abroad with an eSIM, the real question is: do you pay more for 5G or stick with 4G LTE? The answer depends on your destination, habits, and type of trip. Here, we give you all the information to decide wisely.
Technical Differences Between 5G and 4G
Before comparing prices, it's worth understanding the real technical difference between both technologies for the average traveler:
| Feature | 4G LTE | 5G Sub-6 GHz | 5G mmWave |
|---|---|---|---|
| Download Speed (peak) | 150–300 Mbps | 300–900 Mbps | 1–4 Gbps |
| Real Average Speed | 20–80 Mbps | 50–200 Mbps | 200–800 Mbps |
| Latency | 30–70 ms | 10–30 ms | <5 ms |
| Geographic Coverage | Global (95%+) | Cities and Urban Areas | Very Limited (stadiums, centers) |
| Battery Consumption | Moderate | +15–25% vs 4G | +40–60% vs 4G |
| Indoor Penetration | Excellent | Good | Very Low |
The key is that the 5G you find in most countries is 5G Sub-6 GHz (not mmWave), which offers speeds between 2 and 5 times faster than 4G, but with much more limited coverage than the 4G network.
Before looking at the network generation, make sure the problem isn't something else: if you're debating between activating roaming from your Spanish operator or getting a travel eSIM, you can find a complete comparison in eSIM vs. roaming: what suits you best depending on the trip. Often, the difference in experience between 5G and 4G is smaller than the difference between roaming and eSIM.
Real Speeds in Travel Destinations
According to Speedtest Intelligence Q1 2026 data, these are the average speeds users experience with eSIMs in the most visited destinations by Spanish speakers:
As you can see, the difference is real but with nuances: in LatAm, even available 5G performs less than European 4G. The quality of the local network matters more than the technological generation. South Korea tops the list for a reason: if you go to Seoul or Busan, the 5G there is not only the fastest on this list, it's among the best on the planet. You can find details by city in our eSIM guide for South Korea.
5G Coverage Worldwide
5G is not available everywhere. Here is the percentage of 5G coverage by country in urban areas where Spanish speakers primarily travel:
| Country / Region | Urban 5G Coverage | National 5G Coverage | Is 5G worth paying for? |
|---|---|---|---|
| South Korea | 98% | 78% | ✅ Yes, definitely |
| Japan | 94% | 65% | ✅ Yes |
| USA | 91% | 52% | ✅ In large cities |
| Spain | 87% | 71% | ✅ Yes |
| Germany / France | 82% | 58% | ⚠️ Depends on itinerary |
| Mexico | 71% | 29% | ⚠️ Only Mexico City / Guadalajara |
| Colombia / Peru | 55% | 12% | ❌ 4G is sufficient |
| Argentina | 48% | 8% | ❌ 4G is sufficient |
| Thailand / Indonesia | 62% | 15% | ⚠️ Only Bangkok/Bali |
| Morocco / Egypt | 31% | 4% | ❌ 4G is sufficient |
How to know if your mobile and eSIM are 5G compatible before purchasing
Before checking prices, verify two separate things: if your mobile has a 5G modem and if the eSIM you are going to buy includes that network in that specific destination. These are independent issues, and many people assume that one is enough.
For mobile phones, on iPhone, go to Settings → General → About and check the model: any iPhone 12 or later has a 5G modem, but the second-generation iPhone SE (2020) and earlier do not. On Android, almost all mid-to-high-end phones since 2021 have it, but it's worth checking the technical specifications if it's an entry-level model, as there are exceptions even in 2026.
For eSIMs, it's not enough for the local operator to have a deployed 5G network: many travel data profiles (including some third-party ones) are provisioned over an APN that forces LTE, even if your phone is compatible and the country has real 5G coverage. In other words, the "5G" label on the plan's specification doesn't always translate into real 5G speed on the ground. If you have doubts about how this is configured in your profile, in how to install an eSIM step by step, we also explain how to check the active network type once the profile is installed.
A quick trick upon landing: activate airplane mode for 15 seconds and then deactivate it. This forces the mobile to reconnect to the best available network at that moment, instead of staying connected to the one it detected immediately after getting off the plane (which is sometimes 4G even if 5G is available a few meters away).
Battery Impact
One of the most important aspects for travelers is battery life. 5G chips consume significantly more energy, especially when the phone is searching for a 5G signal in areas of partial coverage:
The key data: when your mobile is in an area with intermittent 5G coverage (you go from a 5G area to a 4G area), consumption can skyrocket up to 45% more because the chip constantly searches for the 5G signal. This is especially relevant in destinations with partial 5G coverage.
Practical solution: If your eSIM supports 5G but you are traveling to a destination with partial coverage, consider forcing 4G mode in your mobile settings to improve battery life without losing connectivity. Combined with a few other adjustments (automatic updates paused, low brightness, background app closure), the battery lasts much longer than it seems. You can find the complete list in tips to save data and battery with your travel eSIM.
eSIM Price Difference
How much more does 5G cost in travel eSIMs? The difference is smaller than you might imagine:
| Destination / Plan | 4G eSIM (10 GB / 30 days) | 5G eSIM (10 GB / 30 days) | Difference |
|---|---|---|---|
| Japan | €11.90 | €13.90 | +€2.00 |
| USA | €12.50 | €14.90 | +€2.40 |
| Europe (regional) | €8.90 | €10.90 | +€2.00 |
| Mexico | €7.90 | No 5G option | — |
| LatAm (regional) | €14.90 | No 5G option | — |
In destinations where 5G is available and has good coverage (Japan, USA, Europe), the average extra cost is €2 per plan. A small difference if you are going to take advantage of the speed.
When is 5G Worth It?
Executive summary to decide at a glance:
| Situation | 5G or 4G? | Reason |
|---|---|---|
| Trip to Japan / Korea / USA | ✅ 5G | Excellent coverage, the speed difference is noticeable |
| Intensive remote work | ✅ 5G | Video calls, large file uploads, lower latency |
| Tourism in Western Europe | ✅ 5G | Good coverage in major cities, minimal extra cost |
| Trip to Mexico / Colombia / Peru | ⚠️ 4G | Very partial 5G coverage, 4G is sufficient and more economical |
| Rural tourism or nature routes | ❌ 4G | 5G does not reach outside cities, save battery with 4G |
| Multi-country backpacking in LatAm | ❌ 4G | Many countries without viable 5G, battery life is more critical |
| Mobile with small battery (<3,500 mAh) | ⚠️ 4G | The extra consumption of 5G can be a real problem |
If your next trip is to the United States, check out the eSIM for the United States before deciding: in large cities, 5G is worth it, but in national parks and inter-state highways, you'll be on 4G most of the time, so don't pay for it thinking you'll use it the whole trip. If you're traveling through several European countries, the eSIM for Europe covers major cities well with 5G and offers fallback 4G in areas where 5G is not yet available.
Myths and what almost no one tells you about 5G while traveling
There's a widespread and rather misguided idea that 5G always wins. On paper, yes, but in practice, there are nuances that you only learn by traveling or by carefully reading the network's fine print.
The "5G" icon doesn't always mean what you think
In many countries, the 5G icon you see on the screen corresponds to 5G NSA (Non-Standalone): the data part goes through 5G, but connection control still relies on the base 4G network. It works well and is faster than pure 4G, but it doesn't reach the lab figures advertised for 5G SA (Standalone). If a country boasts very high "national 5G coverage," be suspicious: it's probably NSA, not SA.
Old buildings are the real enemy of 5G, not distance
5G, even in its Sub-6 GHz version, uses higher frequencies than 4G and penetrates thick walls less effectively. In Rome's historic center, in Paris's Haussmann buildings, or in hotels with stone walls in old towns, it's common for the 4G in the hallway to have a better signal inside the room than the 5G on the street. If you're staying in an old building and 5G is slow, it's not the network failing: it's the stone.
Forcing 5G at all costs can give you a worse experience, not better
When your phone is on the border between a 5G zone and a 4G zone, some devices insist on maintaining the 5G connection even if it's weak, instead of switching to a more stable 4G. The result is worse than if you had forced 4G from the beginning: more cuts, more page reloads, and, as you've seen, considerably more battery consumption. If you notice that the connection "is struggling" despite showing 5G, try forcing LTE in your phone's network settings before assuming there's a data plan problem.
5G doesn't fix poor base coverage
5G amplifies the existing network; it doesn't invent it. In an area where the local operator barely has 4G infrastructure, 5G—if available—is usually limited to a very small radius around the antenna, typically in the city center. Outside that radius, you're back to 4G or even 3G. Don't buy 5G expecting it to "fix" an area with poor underlying coverage: first, check the general coverage of your destination, and then decide if 5G adds anything.
Conclusion
The short answer: choose 5G if you're traveling to East Asia, the US, or Western Europe and the extra cost is less than €3. In these destinations, the speed difference is real, and the extra battery usage is manageable.
For trips to LatAm, rural routes, or if you prioritize battery life, 4G is more than enough for WhatsApp, Google Maps, SD streaming, and moderate remote work. Don't pay for speed you won't be able to use.
At PuraSIM, you'll clearly see in each plan whether it includes 5G or not, so you can decide based on your destination without surprises.
Frequently asked questions about eSIM 5G vs 4G
Is my iPhone compatible with 5G abroad?
iPhone 12 and later models support 5G. However, 5G frequencies vary by country: the US uses mmWave, which other iPhones don't support. In Europe and Asia, models from iPhone 12 onwards work with Sub-6 GHz 5G without problems.
Does the 5G eSIM plan activate automatically, or do I need to enable it?
With most travel eSIMs, the 5G network activates automatically when your device is in a 5G coverage area. No special configuration is needed unless you have forced 4G mode in your settings.
Does it make sense to pay for 5G to watch Netflix while traveling?
For HD streaming, you need at least 5 Mbps; for 4K, 25 Mbps. Typical 4G (20-80 Mbps) is more than enough for any streaming. 5G adds value for uploading large files, 4K video calls, and online gaming.
Does 5G use more data than 4G?
Not directly. However, since 5G connections are faster, apps may automatically download higher-quality content (YouTube in 4K, larger app updates). Check your video quality settings in your applications.
Can I use a 5G eSIM on a 4G phone?
Yes. A 5G eSIM plan works perfectly on 4G devices, simply using the 4G network. There is no incompatibility — you just won't enjoy the 5G speeds, but connectivity is complete.
Does 5G work the same with all operators in the country I visit?
Not necessarily. Within the same country, each local operator has its own pace of 5G deployment: one might have good coverage in the capital's center, and another only patchy coverage in specific areas. The travel eSIM connects to the local partner's network that the provider works with, so the experience can vary from one plan to another even if the destination is the same.
What happens if my plan includes 5G but my phone doesn't support it?
Nothing serious happens: the phone automatically connects to the best available network that it does support, usually 4G LTE. You don't lose the plan or have to do anything special; you simply won't notice the speed difference that 5G offers. That's why it's advisable to check your model's compatibility before paying extra for a 5G eSIM.
