[10% Discount] Guam eSIM (Unlimited Data)

• Purchase the product
• Scan the QR code on the voucher sent via email
• Register the eSIM according to the registration method for your device's operating system
• Validity Period: Available for use within 180 days from the purchase date
• You can find detailed eSIM installation instructions on our official Installation Guide.

​​​​​Operating Hours:
Messenger Customer Service
24 hours a day, 7 days a week

Phone Customer Service
09:00 AM ~ 06:00 PM (Lunch break 12:00 PM ~ 01:00 PM)
Closed on weekends and public holidays

Contact Information:
Domestic: 1661-0158
International (Local Issues Only): 070-5097-6417
KakaoTalk Plus Friend: @USIMSA

Refunds are available only within 7 days of purchase.
However, refunds for the following month may be difficult to process, and refunds are not possible if the product has been used or already registered on the device.
Due to the nature of products used locally overseas, refunds requested due to reasons such as connection failure, unavailability, or eSIM malfunction may be due to issues with the device being used, inexperience with settings, or temporary communication disruptions, rather than product issues. Therefore, refunds will only be processed after consultation through customer service (phone, email, KakaoTalk) using local Wi-Fi etc. and with approval.
Refunds requested after returning home without prior confirmation may not be processed.

Cancellations/refunds are applicable only to requests received during business hours (weekdays 09:00-18:00).