ベトナム eSIM 毎日5GB｜即日開通・契約なし｜C.T.S
CTS Mobile

[Vietnam eSIM] 5GB/Day | Instant Activation, No Contract | QR Code Setup

eSIM > Vietnam > Daily Data

¥2,994
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Pay with VISA Mastercard JCB AMEX Konbini Bank transfer Cash on delivery
3D Secure 256-bit SSL Encryption
Free Nationwide Shipping Across Japan (On Select Products)
Bilingual Customer Support

Vietnam eSIM 5GB/Day | Instant Activation, No Contract

C.T.S's Vietnam eSIM “5GB/Day” 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: 5–10 days (5, 7, 10). Operated by C.T.S Co., Ltd., a Japanese company.

Plan details

CoverageAll of Vietnam
NetworkVinaphone
Data5GB per day (resets daily)
Duration5–10 days (5, 7, 10)
Phone number & SMSNone (data only)
DeliveryQR code by email (within minutes)
Pay today · 5 days ¥2,994

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

Japan eSIM. Online in minutes.

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

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