Find the best eSIM for East Asia
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Not that fast but okay-ish speeds in Japan on the KDDI (au) network. However, the biggest drawback is that this eSIM routes through Hong Kong (HK IP address), so ChatGPT doesn’t work which is a real shame.
I used the Global eSIM 1GB with a coupon for use within Japan.
It worked very smoothly.
When I went to Hakone where the signal tends to be weak, it stayed connected by switching between SoftBank and KDDI depending on the location.
I think it’s good to keep one as a backup in case of network outages.
The IP address will be from overseas so be careful with Japan-only services.
I tried ordering the FREE plan and set it up on my iPhone SE2.
At first, the eSIM activation stayed in “processing on the server” status for about 10 minutes without any response, so I just left it for a while until it finally completed.
After that, the phone stayed out of service and couldn’t connect to the network for over an hour. I had almost given up, but eventually, it just started working on its own.
In terms of speed, there were no issues.
While using the service, I kept checking the data usage on the website, but after reaching 0.01GB, the connection stopped working completely. I thought maybe the usage display was just delayed, but even the next day, it hadn’t updated. It felt like I had used more data than what was shown, so the website’s usage display doesn’t seem very reliable.
Bought a plan and nowhere in the checkout process was 4G only mentioned. Contacted support and they cancelled the plan as requested but they also pettily banned my account.
Connectivity and speeds were spotty in Osaka and Kyoto. eSIM did NOT support hotspot sharing. Would not buy an eSIM from this provider again.
It didnt connect ntt docomo. It connects iij and its around 5 mbps, too slow..
Their support was top notch, the process overall is pretty easy and the internet was very quick
This was my first time downloading an e-SIM. I used an iPhone 15 and everything was very simple. I didn't use the calls, just the data plan, 5GB for 10 days in Australia for $6, and it worked great. The price was very reasonable, and although I didn't check the remaining data, I can say that it was enough for me.
Throttled to 12 mbps. Otherwise perfect connection and excellent price.
I’ve used Billion Connect for multiple eSims abroad now, and I’ve found them great every time. Their customer service responds pretty quickly to any issues, and the sims are cheap and work well. Be aware the sims are mostly based in Hong Kong so if you’re geographically far from there the latency might be a little high, and you may need a VPN for things like TikTok to work, but I’ve had very few issues.
Do not buy the Clearance esim. It's not mentioned on the website, but it's routed through Hong Kong. The connection is very bad and 5G seems capped at slow speeds. I had issues keeping a consistent connection and ended up buying a MobiMatter esim that has worked flawlessly.
The product claimed to support multiple carriers, so I decided to try out the "eSIM, 3GB, 30 Days, Japan" for use in Japan.
It seems the APN "vmobile.jp" (iij) can be used, but... is this really multi-carrier?
Beware: 1) No call/text available in South Korea. 2) Routed via HK so not the best service due to latency, but the same as most competitors in SK for eSIM. 3) Weird discrepancy on their website about price in USD vs charged amount ($1.00 USD more is charged than shown online). How do I know? I bought 3 eSIMs from Giga.Tel in South Korea, and over 10 from eSIM competitors. So far they are still the cheapest for the same 30GB and quality of service. Plus you can checkout with American Express in case of a dispute (MobiMatter does not allow Amex)
Used without issues in both Tokyo and Osaka. The latency wasn't great due to roaming connection through Singapore, but was manageable. At least it’s more convenient than eSIMs that go through Hong Kong and don’t work with services like ChatGPT. The network was au’s LTE or 5G, and signal was solid everywhere, no complaints.
I went with this esim because of the great value and because I saw a positive review (after having tried a couple esims in the past with various companies that barely worked, I'm always a bit apprehensive to try one without and positive reviews) and I just wanted to second that review - airlink worked perfectly throughout Korea (have been connected to SK network the whole 3 weeks) and when considering price per GB, I doubt there are many better options.
The internet worked perfectly everywhere – airports , even on road trips. No annoying "loading..." screens! Plus their customer chat is LEGIT. Messaged them at 1AM (jetlag lol) and replied in 2 minutes. She literally stayed on chat while I set it up, double-checked everything. Way cheaper than my phone plan back home. Never going back to regular SIM cards!
Price was very good, installation was easy and everything worked after setting up the APN. Speed was also good (see speedtest image).
The network showed as "IIJ" which operates on the NTT docomo network. It had coverage almost everywhere except once for about 5 minutes, no big deal.
Top-up was easy but only possible in the app, not the website.
Would definitely recommend and use again!
coverage was very good, easy setup at public wifi spot upon arrival. One major thing though: internet breakout is Hong Kong.
There is no instagram coverage (anymore) in Hong Kong!
If you plan to use this operator, you should be aware of this.
Sim does not work for data in Korea. They also claim 24/7 support but they haven’t been online for the last 6 hours. Avoid company, I was left without any internet access when I landed and had to scramble poor free wifi to buy a different eSIM.
They still have not refunded me going to have to file a charge back. Avoid at all costs
Doesn't work! Waste of money! I was only able to see if it works after arriving in Japan in March '25, but I never got connected when automatic carrier selection is on. I chatted with the BNESIM support and was told to select KDDI manually. After that I was able to get connected, for no more than 2 mins each time in a series of unsuccessful attempts. I then chatted with the support again. This time they said this case will be escalated to the advanced team and I'd be hearing from them within 24 hrs. Yes, you're right! The never responded to me afterwards! Sadly speaking, this is the second time I run into the same situation with them. I bought another esim in 10 mins from EIOTCLUB and I got continuous, stable connection ever since. So which one is the scam?
Installation was easy, price was okay. Coverage and speed were good.
However, the website said it would connect to all networks (docomo, KDDI, SoftBank, Rakuten) but only KDDI worked for me.
The usage display only updated every 5 days (not ideal). Top-up was not possible.
Overall an okay experience.
As a proper Naija person wey no like wahala, I carry Nesa Mobile enter Japan and I must say e work like magic! From Tokyo to Osaka, network dey steady. No need to dey look for WiFi or disturb anybody for hotspot.
Activation na breeze I just scan small QR code, and boom, my phone don dey browse like say I never comot Naija.
Sometimes the speed go slow small, especially for some areas or inside train, but other times e dey fast well enough to browse, chat, even use map when I waka lost (no shame, e happen).
One thing I gatz salute dem for na customer support. When I get small issue, I message them and dem respond quick quick. No long story. Thanks Omar!
technically functional but extremely slow speed
Infuriatingly slow even though eSIMDB customer service said low latency would feel snappier than 5G options. Couldn’t even use Google Translate image translation, and Google Maps takes significantly longer to load any given place’s details. Wouldn’t recommend or use again.
Fast speeds on Chunghwa Telecom's network through an Hong Kong service provider, which means that unless you connect to a VPN to override your location, websites/apps will think you're accessing them from Hong Kong. Minor annoyance for a very affordable and reliable eSIM though.
Break Out Point is Japan.
You will connect to IIJ (ISP)
You cannot use hotspot
The sim isn't working if your don't provide your passport, I'm a taiwanese resident and can't use my card before it's transferring this data to china
I used Nesa for almost 2 weeks. Nesa was working with great speed. I had a problem with internet and they immediately fixed the problem. They have a fastest customer service i have ever had. Eventhoug the problem turns out to be a local telecom provider. I encourage everybody to choose Nesa greate service.
I used their unlimited 3-day plan and could use more than 20GB of data, so it seems to be indeed unlimited. However, the speed was capped at 10 Mbps the whole time.
Traffic was routed through Hong Kong, so the latency was not great but not too bad.
The issue with a Hong Kong IP is that I couldn't access some services like ChatGPT.
I must say Truely worked better than I expected in Hong Kong. With the internet breakout located within Hong Kong, the low Ping made the connection feel snappy and responsive, and the speeds were satisfactory.
The only downside was that ChatGPT couldn't be used with a Hong Kong IP address, and it would've been better if the price were a bit lower.
The price is a bit high but the network worked perfectly and the speeds were good. Also the app they have works very well.
The price is good and the speed is fine but in my case I suffered from several outages of even a few hours without service which can be a very negative factor.
My first time using a cheep esim provider. Thought I would get scammed, but that was not the case! Gave me all ten gigabytes I bought! Around the first 5GB I used, data stopped working. I than proceeded to follow there instructions on setting the apn settings to the right value and was able to continue using data. Wish they told me to do this right after I installed the esim.
The internet was extremely slow on almost all websites except YouTube. I got the 50€ unlimited package. I don't recommend at all
Fast enough but the game I play, Azur Lane, IP blocks access to global server.
Installation, price, set up was as easy as you can get. However, the speed in South Korea was abysmal (I had better experience in other country).
Usually slow but usable, but at times you opened Google Maps and it wouldn't even finish loading your "pins". So stressful to use, up to the point that one friend with the same SIM got himself a different one during the trip and I hopped Free Wi-Fis. Not what I bought this SIM for!
Easy to use through the app, the price was very good (and there are coupons around through many sponsors if you search). But was kinda slow at times, up to the point it was unusable for ~1h. Difficult when relying on Google Maps for bus transfers.
DO NOT BUY AN ESIM FROM THIS COMPANY
The internet speed is 0.01Mbps, i am not kidding. I am in the middle of tokyo.
Had some trouble setting this up at first. The eSIM supports many of the major networks in japan (KDDI, NTT Docomo, SoftBank) and I had to manually force it to connect to Docomo before it would work.
On android: Settings -> Connections -> Mobile Networks -> Network Operators -> disable "select automatically"
After that, it worked flawlessly.
Frequently Asked Questions
How many travel eSIM brands (providers) are available for use in East Asia, and how many prepaid data plans are there?
In East Asia, there are about 70 travel eSIM providers and around 2 000 prepaid data plans, giving travelers a wide variety of options to choose from that fit their needs.
Are there any unlimited data eSIM plans available for East Asia?
Unlimited data eSIM options are available for travelers heading to East Asia. Providers such as Billion Connect, Truely, Yoho Mobile, Yesim and Roamify all offer plans with no data cap, valid for 1 to 30 days. These plans typically allow tethering, but most have some degree of speed limitation or throttling; for example, Yoho Mobile imposes a 5 Mbps speed cap. Prices for unlimited data plans range from about $2.53 to $449.07 USD, with individual providers offering a spectrum of cost options. When choosing a plan, consider the expected data use and the pacing of speeds, and pick a package that meets your comfort and budget levels.
Summarized by Gen AI. Last updated:
All eSIM providers available in East Asia
data plans for the provider(s) with this icon are programmatically fetched and updated.