Questions

 What makes the Extreme more durable than the other Iridium handsets?

• Military Grade Durability Tests Passed (MIL-STD 810F Test Procedures)

• IP65 Rating: Dust-Proof and Protected Against Jet-Water

 Outside of the LBS and Emergency SOS features, is the functionality of the Extreme similar to the 9555?

Yes. The functionality is the same.

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