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Page 86 / 96 Scroll up to view Page 81 - 85
Appendix
82
Appendix
See the following topics for more information.
Troubleshooting
Check the questions and answers below for troubleshooting solutions for common device issues.
Check Here First
Question
: Unable to connect via Wi-Fi (WLAN)
Answer 1
: Check whether the mobile broadband device is properly connected to the computer
or other external device.
Answer 2
: If a WPS (Wi-Fi Protected Setup) connection fails, see the Wi-Fi device user guide. If
you're still unable to connect, set up the mobile broadband device Wi-Fi connection manually.
Answer 3
: To connect a WPS Pin-specified Wi-Fi device, check whether the correct PIN has
been used.
Answer 4
: If OPEN WEP is the security method being used, check whether the correct WEP
key is entered. If the WEP key is unknown, reset the WEP key and reconnect the device.
Answer 5
: Check whether the correct WPA key is set. If the WPA key is unknown, reset the
mobile broadband device or see the WLAN Initialization Sticker to reset the WPA key, and then
reconnect the device. WPA/WPA2 security may not be supported depending on the Wi-Fi
device. See the Wi-Fi device user guide for information.
Question
: Computer does not recognize the mobile broadband device.
Answer 1
: Check whether the mobile broadband device is properly connected to the computer
or other external device.
Answer 2
: Remove the mobile broadband device from the PC, restart the PC, and then
reconnect the mobile broadband device.
Answer 3
: For Windows 8, follow these steps to confirm proper the mobile broadband device
installation.
l
Open desktop window > Explorer > right-click
Computer
>
Properties
>
System
protection
>
Hardware
>
Device Manager
, and then check that "Remote NDIS based
Internet Sharing Device" in "Network adapters "is shown.
Answer 4
: For Windows 7 and Windows Vista, follow these steps to check that the mobile
broadband device is properly connected.
l
Right-click
Computer
>
Properties
>
Advanced system settings
>
Hardware
>
Device
Manager
, and then check that "Remote NDIS based Internet Sharing Device" in "Network
adapters" is shown.
Page 87 / 96
Appendix
83
Question
: Driver is not automatically installed when the mobile broadband device is connected to
the PC (Windows PC only).
Answer 1
: Wait several seconds for installation to begin after the system recognizes any new
hardware. If the installer does not automatically activate even after a period of time, remove the
mobile broadband device from the PC and reconnect it.
Answer 2
: Install driver manually. See
Software Installation – Windows PC USB Connection
for
how to install.
Question
: Internet connection fails.
Answer 1
: Make sure that you are within the service area.
Answer 2
: If signal reception is poor, move to where signal reception is good and then
reconnect.
Answer 3
: The access point might be busy depending on the time of day. Wait a little and then
reconnect.
Answer 4
: Activate the Web UI and make sure that network settings are correct. See
Web UI
Overview
.
Question
: Transmission fails quickly.
Answer 1
: Make sure that the mobile broadband device is properly connected to PC or other
device via Wi-Fi or micro USB cable. If connected via micro USB cable, disconnect from both the
mobile broadband device and the PC or other device and reconnect.
Answer 2
: Signal reception might be poor. Check transmission where signal reception is good.
Answer 3
: Restart the mobile broadband device.
Answer 4
: Check the mobile broadband device battery level. If battery level is low, charge with
AC charger or with PC via micro USB cable. See
Charge the Battery
for how to charge.
Question
: Transmissions are slow.
Answer 1
: Signal reception might be poor. Check transmission where signal reception is good.
Answer 2
: Connection might be poor. Try again after a while.
Question
: Forgot PIN / Unknown PIN Unblocking Key (PUK) / SIM card is locked.
Answer
: Contact Sprint Customer Service at 1-888-211-4727.
Question
: SIM card is not recognized.
Answer 1
: Check whether the SIM card is properly installed. For details, see
SIM Card
.
Answer 2
: Check the SIM card for damage.
Answer 3
: Check the SIM card IC chip for scratches/corrosion.
Page 88 / 96
Appendix
84
Answer 4
: Dirty SIM card (particularly IC chip) may prevent recognition. Clean gently with a soft
cloth.
Answer 5
: Contact Sprint Customer Service at 1-888-211-4727.
Question
: Unsure if logged on as an Administrator.
Answer 1
: For Windows 8, follow these steps to check.
l
Move the pointer into the upper-right or lower-right corner and then click or tap
>
Control
Panel
. Click
Change your account type
in User Accounts, and then check that the type of
account currently logged on to is "Administrator".
Answer 2
: For Windows 7, check by following these steps.
l
Click
Start
menu >
Control Panel
>
User Account and Family Safety
>
User Account
,
and then check that the type of account currently logged on to is "Administrator".
Question
: "Out of service area" indication appears when outside USA.
Answer
: Power off and restart the device.
Question
: How do I return the mobile broadband device to the default settings (reset)?
Answer 1
: Use the device Reset key.
Answer 2
: Use the Web UI to reset the device.
Question
: An old phone number appears on the Web UI.
Answer
: The Web UI may display an old phone number depending on subscription terms or
cancellation method.
Question
: The mobile broadband device operation is unstable.
Answer 1
: Avoid extremely high/low temperatures, high humidity, direct sunlight, dusty areas,
etc. Read "Safety Precautions" for use in a proper environment.
Answer 2
: Avoid invalid software. Operation is unguaranteed for Internet connection, etc., using
other-party software.
Question
: The connection suddenly failed.
Answer 1
: The connection method may have been changed. Check connection mode on the
mobile broadband device display.
Answer 2
: Restart the mobile broadband device.
Specifications
The following tables list the specifications for the mobile broadband device, the AC charger, the
micro USB cable, and the materials.
Page 89 / 96
Appendix
85
Mobile Broadband Device Specifications
Item
Description
Model Name
Pocket Wi-Fi (MF975S)
Dimensions
1
116.3mm x 62.1mm x 13.9mm
Weight
149.7g
Interface
LCD
Max Power Consumption
4W
Operating Environment
-10
℃
~ 60
℃
Frequency
1.2G
Compatible Networks
WAN: 4G (AXGP/FDD-LTE), 3G (W-CDMA), 3G High
Speed (HSUPA, HSDPA), ULTRA SPEED (HSPA+, DC-
HSDPA) WLAN: IEEE802.11b/g/n
Charging Time
2
AC charging 180 minutes, USB charging 360 minutes
Continuous Standby Time
3
FDD_LTE: 500 hours, TDD_LTE: 900 hours
1
Approximate values
2
Varies by ambient temperature, battery usage, etc.
3
Varies by environment, signal conditions, etc.
AC Charger Specifications
Item
Description
Model Name
STC-A51A-Z
Weight
30g
Rated Voltage
DC 5 V ± 5 %
Rated Current
1.0 A - 1.2 A
Input Voltage
100 V - 240 V, 50 Hz/60 Hz
Micro USB Cable Specifications
Item
Description
Model Name
USB-MU5-B-120-H (ZEDAD1)
Cable Length
1200mm
Plug Type
Standard-A, micro-B
Charging Temperature
0
℃
~ 55
℃
Page 90 / 96
Appendix
86
Materials Specifications
Parts
Materials/Finishing
MF975S Front Cover
PC+SUS304
MF975S Back Cover
PC+GF+SUS304
MF975S Battery Cover
PC
MF975S SIM Tray
PC+Powder Metallurgy
MF975S LCD Support Frame
PC
MF975S Power Key
PC
MF975S Lock Key
PC+TPU
Warranty and Service
The following topics outline your device's warranty and service information.
Warranty
Your device purchase includes Warranty.
n
Confirm shop name and purchase date.
n
Read contents of Warranty and keep it in a safe place.
n
Check warranty period in the Warranty.
Services
Before submitting your device for repairs, contact Customer Service or General Information; be
prepared to describe problem in detail.
n
During the warranty period, repairs will be made under the terms and conditions described in the
Warranty.
n
After the warranty period, repairs will be upon request; if said repairs can be made, you will be
charged for them.

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