ベトナム eSIM 総容量10GB｜即日開通・契約なし｜C.T.S
CTS Mobile

[Vietnam eSIM] 10GB Total Data | Instant Activation, No Contract | QR Code Setup

eSIM > Vietnam > Total Data

¥3,221
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3D Secure 256-bit SSL Encryption
Free Nationwide Shipping Across Japan (On Select Products)
Bilingual Customer Support

Vietnam eSIM 10GB Total Data | Instant Activation, No Contract

C.T.S's Vietnam eSIM “10GB Total Data” is a prepaid eSIM on Vinaphone. Your QR code arrives by email right after purchase — just scan it to finish setup. No contract and no auto-renewal. Duration: 20 days. Operated by C.T.S Co., Ltd., a Japanese company.

Plan details

CoverageAll of Vietnam
NetworkVinaphone
Data10GB total for the whole period
Duration20 days
Phone number & SMSNone (data only)
DeliveryQR code by email (within minutes)
Pay today · 20 days ¥3,221

Get online in 3 simple steps

Instant digital delivery. Scan your QR code and connect in minutes.

1

Choose your plan

Select your trip duration and data allowance, then checkout online.

2

Receive your QR code

Receive your digital activation QR code by email within minutes. No shipping wait.

3

Scan and connect

Scan the QR code in phone settings and get online right after arrival.

What you get

Delivery Instant QR code (via Email)
Network Japan 4G / 5G (KDDI & SoftBank)
Tethering Supported (Free hotspot sharing)
Calls / SMS Data only (App VoIP calling)
Device support eSIM-capable unlocked phones
Contract None (Prepaid lock-free)

Why choose C.T.S

C.T.S eSIM Typical carrier SIM
Activation speed Instant QR scan Shop visit or shipping wait
Paperwork / ID check None required Strict Japanese ID check
Contract period None (Prepaid lock-free) 1–2 years lock-in + fee
Support languages English, Japanese & Multilingual Japanese only

*Based on our 2026 research comparing contract terms, setup fees, and cancellation policies.

Real people, real eSIMs

Instant setup & helpful support for your stay in Japan.

★ 4.9/5.0 · 98.4% Customer Satisfaction · Saitama Bilingual Support

Questions before you buy

Need help with compatibility, activation or your QR code?

WhatsAppで問い合わせ Messengerで相談
Dial *#06# on your phone. If an EID number appears and your device is carrier-unlocked, it supports eSIM.
Your QR code is generated and delivered automatically to your email within minutes after checkout.
Yes! Dual-SIM phones allow keeping your home SIM active for SMS/OTP while using C.T.S eSIM for local Japan mobile data.
Validity starts only when your eSIM connects to a supported local network in Japan, not when scanned.
Yes, personal hotspot (tethering) is fully supported for laptops and tablets at no extra charge.
WhatsAppで問い合わせ

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No shipping wait. Scan your QR code and connect instantly across Japan.

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