Samsung SPH-M390 Online User's Manual page 116

Precautions for Transfer and Disposal
If data stored on this device is deleted or reformatted using the
standard methods, the data only appears to be removed on a
superficial level, and it may be possible for someone to retrieve and
reuse the data by means of special software.
To avoid unintended information leaks and other problems of this
sort, it is recommended that the device be returned to Samsung's
Customer Care Center for an Extended File System (EFS) Clear
which will eliminate all user memory and return all settings to default
settings. Please contact the
details
Important:
Please provide warranty information (proof of
purchase) to Samsung's Customer Care Center
in order to provide this service at no charge. If the
warranty has expired on the device, charges may
apply.
106 Manufacturer's Warranty
Samsung Customer Care Center
Customer Care Center:
1000 Klein Rd.
Plano, TX 75074
Toll Free Tel: 1.888.987.HELP (4357)
Samsung Telecommunications America, LLC:
1301 East Lookout Drive
Richardson, Texas 75082
Phone: 1-800-SAMSUNG (726-7864)
for
Phone: 1-888-987-HELP (4357)
Important:
If you are using a handset other than a standard
numeric dialpad, dial the numbers listed in
brackets.
©
2012 Samsung Telecommunications America. All rights
reserved.
No reproduction in whole or in part allowed without prior
written approval. Specifications and availability subject to
change without notice.