Samsung Galaxy Note 4 - Manual (Page 144)

Sprint Worldwide Wireless Service 133
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Any error message that displays on your phone or that you heard when trying to place a call.
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If the issue is with data, were you able to place voice calls?
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If the issue is with voice service, were you able to access data?
Please call the numbers below if you need assistance:
While in the United States: Call 1-888-226-7212.
While traveling outside the United States:
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In GSM mode: Touch and hold , and then dial 1-817-698-4199.
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In CDMA mode: Enter the country code, and then dial 1-817-698-4199.
There is no charge for this call from your wireless phone.
From a landline phone when outside the United States:
Sprint Worldwide Customer Support can be reached from a landline phone at 1-817-698-4199.
Access or connection fees may apply. The toll free numbers below can also be used to contact
Sprint Worldwide Customer Support in the following countries:
Coutnry From Landline Phone
Caribbean (Anguilla, Barbados,
Cayman Islands, and Dominica) 1-888-226-7212
France 0800-903200
Germany 0800-180-0951
Italy 800-787-986
Mexico 001-877-294-9003
Trinidad and Tobago 1-800-201-7545
United Kingdom 0808-234-6616
Note: This toll free service is available on ordinary landline phones and some public pay phones.
This service does not cover any hotel access charges.