Sandwich Isles Wireless - A Waimana Company

Aloha and Welcome!
Established in 2011, Sandwich Isles Wireless (SIW) is a native Hawaiian owned and operated wireless service provider. SIW's simplified plans provide customers with a no-nonsense approach to wireless communications. Customers no longer need to track minutes, text messages or data usage to ensure they don't exceed plan limits and incur expensive overage charges; nor do they need to track who they call or when they call. SIW plans are truly unlimited to any number, anytime. There are no complicated gimmicks or fine print to interpret. With SIW, unlimited really means unlimited.


  • UNLIMITED calling, texting & data plans
  • Residential, Non-profit & Commercial rates available

Contact Us

By mail:
Sandwich Isles Wireless
P.O. Box 893128
Mililani, HI 96789

By email:

By phone:
Residential customers on Oahu:  540-5754
Commercial customers on Oahu: 540-5760
Toll-free from the neighbor islands: 1-888-995-7274

View your bill

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