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Topics > 3G/4G Modem and Carrier Issues

3G/4G Modem and Carrier Issues (72 FAQs)
Issues for specific 3G & 4G modems and cellular carriers


Top 10 FAQs For This Topic
Using the Netgear AirCard 340U (AT&T Beam) USB modem in the LAN-Cell 3 or PocketPORT
Configuring the Verizon / Pantech UML295 USB Modem for Remote Access Applications
Locking Verizon / Novatel USB551L into 3G or 4G Mode
Locking Verizon / Pantech UML290 into 3G or 4G Mode
Using the Verizon Wireless / Pantech UML295 with the LAN-Cell 3
Tips for optimizing the performance of the Pantech / Verizon Wireless UML290 4G/LTE USB modem
Verizon USB modems must operate in LAN mode
I'm having trouble with DynDNS updates
How can I improve cellular signal strength?
External antenna port location on Sierra Wireless 312U, 313U, 320U, 330U modems

Recently Added FAQs To This Topic
Meaning of the LED Status Indicators on the Verizon / Novatel USB730L Modem
ZTE MF861 (AT&T Velocity USB Stick) not recognized by the PocketPORT 2
Using the ZTE MF861 (AT&T Velocity USB Stick) with the PocketPORT 2
Locking the Verizon Wireless / Pantech UML295 to 3G or 4G mode
Configuring the Verizon / Pantech UML295 USB Modem for Remote Access Applications
Huawei E3131 modem status LED colors
Huawei E392 Status LED Colors
Huawei HiLink Modems
Using the Netgear AirCard 340U (AT&T Beam) USB modem in the LAN-Cell 3 or PocketPORT
AirCard 341U modem does not work in Windows/Mac/Linux after being used the LAN-Cell or PocketPORT routers
AirCard 341U shows status "NAT HIDDEN" in LAN-Cell 3
Pantech UML295 Status LED Color Chart
Using the Verizon Wireless / Pantech UML295 with the LAN-Cell 3
Using the Sprint Plug-in-Connect Tri-Mode USB Modem (Franklin Wireless U770) with the LAN-Cell 3
External antenna port location on Sierra Wireless 312U, 313U, 320U, 330U modems
Using the Verizon JetPack 4620L with the LAN-Cell 3 via USB Tether Mode
Where can I get a copy of the Verizon Wireless Access Manager (VZAM) software for my modem?
Where can I get a copy of AT&T Communications Manager (ACM)?
PocketPORT Modem Setup Guides
Tips for using Verizon Wireless 4G modems in the LAN-Cell 3
Tips for optimizing the performance of the Pantech / Verizon Wireless UML290 4G/LTE USB modem
Pantech / Verizon UML290 modem not working in the LAN-Cell 3 or PocketPORT
Frequencies used by U.S. cellular carriers
Verizon / Novatel USB551L does not work in VZ Access Manager after use in router
Verizon USB modems must operate in LAN mode
Novatel Wireless Ovation MC679 Modem LED Status LED Indicator
Troubleshooting USB Modems
Configuring the LAN-Cell 3 for a static WAN IP on Verizon Wireless
Novatel Wireless MC998D / U998 LED Status Indicator
Locking Verizon / Novatel USB551L into 3G or 4G Mode
Locking Verizon / Pantech UML290 into 3G or 4G Mode
Verizon / Pantech UML290 Modem Status LED Indicator
External antenna jack location on the USB551L
Novatel USB551L / MC679 Flashes Yellow/Green LED
Sierra Wireless 312U, 313U, 319U, 320U Status LED Indicators
Verizon / Novatel USB551L Modem LED Status LED Indicator
Modem name shown in firmware is different than my actual modem model
How to change APN's in AT&T Communication Manager software
Signal strength display does not update when using the Novatel PC-770 (Verizon) or C777 (Sprint) 3G modem
What LAN-Cell 2 firmware version is required to support the Novatel PC-770 (Verizon) or C777 (Sprint) 3G modem?
What LAN-Cell 2 firmware supports the Sierra Wireless AirCard 402?
Attaching a Card-Guard external antenna pigtail to the Novatel PC-770 (Verizon) / C777 (Sprint) 3G modem
Attaching the Card-Guard external antenna pigtail to the Sierra Wireless AirCard 402.
What does the status message: "The device can't execute the modem command in the current state!" mean?
How to update the PRL on a CDMA 3G PC-Card modem
Kyocera KPC-680 disconnects every 60 seconds
About Mobile Terminating Data Service, Custom APN's, Dynamic DNS & Inbound Connections on AT&T Mobility
Speed tests of my 3G/4G modem are higher in a laptop than in the LAN-Cell.
Will increasing cellular signal strength increase throughput speeds?
Attaching a Card-Guard pigtail to the Kyocera KPC-680 ExpressCard
Where do I configure the static IP addresses assigned to my modem by the cellular carrier?
CRITICAL: Sierra Wireless AirCard 881 AT&T firmware upgrade requires patch to LAN-Cell 2 firmware
Can I use a USB cellular modem with the LAN-Cell 2?
Unable to access port 5000 on Sprint
How can I improve cellular signal strength?
My first few PING's timeout or take several seconds to reply.
Unable to make inbound connections from the Internet to the LAN-Cell using Alltel
Alltel Axcess Broadband Login Information
Sierra Wireless branded AirCard 881 not recognized.
LAN-Cell 2 reboots continuously
Forcing the LAN-Cell 2 to use a specific network type/frequency.
Attaching Card-Guard pigtail to the Sierra Wireless AirCard 881, 880 & 875.
Attaching Card-Guard pigtail to the Novatel EX720 & V740.
The LAN-Cell 2 does not recognize my PC-Card modem.
Signal strength not being updated.
Signal strength reports 0 dBm (Poor) when dialing.
Attaching Card-Guard pigtail to the Huawei EC360.
AirCard 595 stuck in INIT status.
Cellular Connection Status stays NOT REG or INIT for a long time.
Service Provider field says "Unknown".
How do I update the PRL?
I'm having trouble with DynDNS updates
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