Thank you for using Xoxzo, Cloud Telephony Platform.
Starting March 1, 2025, the messaging fees for K Premium Service have been reduced. Please check the updated pricing details on our Pricing Page.
About K Premium Service K Premium Service is an optional SMS transmission service for corporate users, enabling direct connectivity for SMS delivery to recipients on all four major domestic carriers: NTT Docomo, KDDI, SoftBank, and Rakuten Mobile.
Important: Registration and a simple pre-screening process are required before use. Feel free to contact our help desk for assistance.
For more details, please refer to our API Documentation and Website.
Differences Between K Premium Service and Standard International SMS Transmission
| K Premium Service | SMS Transmission | International Network |
|---|---|---|
|
✅ Higher delivery success rate ✅ Sender ID can be a phone number or a 6-digit code ✅ Difficult for recipients to block messages ❌ Not available for personal use; pre-registration required |
Features |
✅ Allows displaying company/service names in alphanumeric format ✅ Can be used immediately ❌ May be blocked due to international SMS settings |
|
📌 Pre-registration required For Docomo, au, Rakuten Mobile: Phone number displayed For SoftBank: 6-digit code displayed |
Sender ID Display | Alphanumeric characters (e.g., EZSMS, BOOKSTORE, HAIRSALON, etc.) |
EZSMS also provides Kpremium service, which routes only KDDI(au)numbers to the direct routing.
Please contact helpdesk for further details.
Aiko Yokoyama
Customer Success and Operations
Joined January 2014. Experienced as a clerk in Foreign Trading company, started and maintained an online supplement store. Lived in overseas for 15 years. Looking forward to communicating our customers with the broad view based on those experience.
