E303s-2 - 3G/4G Key HUAWEI - Free user manual and instructions

Product Type	3G/4G USB Modem
Model	E303s-2
Brand	Huawei
Dimensions	Approx. 90 × 30 × 15 mm
Weight	Approx. 30 g
Power Supply	USB powered (5V, 500mA)
Network Support	3G/4G LTE (up to 150 Mbps DL)
Interface	USB 2.0
Memory Card Slot	MicroSD up to 32 GB
Operating Systems	Windows, macOS, Linux
Plug and Play	Yes (driverless on most systems)
LED Indicators	Power, Network signal, Data activity
Antenna	Internal
Functions	Internet access, SMS, Data storage (via microSD)
Care and Cleaning	Keep dry; wipe with soft cloth; avoid solvents
Safety	Do not disassemble; avoid exposure to liquids; unplug during storms
Spare Parts and Repairability	Not user-serviceable; contact Huawei support for repairs
General Information	Frequency bands: 800/900/1800/2100/2600 MHz (varies by region)

Frequently Asked Questions - E303s-2 HUAWEI

How do I set up the Huawei E303s-2 on Windows?

Insert the device into a USB port. The built-in software will auto-run and install drivers. If not, open 'My Computer' and run the 'AutoRun.exe' file.

Why is the LED not lighting up?

Ensure the USB port is powered. Try a different port or computer. If still off, the device may be faulty.

Can I use a microSD card for storage?

Yes, insert a microSD card (up to 32 GB) into the slot. It will appear as a removable drive.

How do I access the modem settings?

Open a web browser and go to http://192.168.1.1. Default credentials are often admin/admin.

What do the LED colors mean?

Green: powered; blinking green: searching network; solid green: connected; blue: 4G; red: error or low signal.

Does it work with a prepaid SIM?

Yes, it supports standard SIM cards. Ensure the SIM is unlocked and has data plan.

How do I reset the modem?

Use a pin to press the reset hole on the device for 10 seconds while powered.

The connection keeps dropping. What should I do?

Check signal strength; move to a better location. Update drivers or change USB port. Also verify the SIM is active.

Can I use it with Linux?

Yes, it is supported on most Linux distributions via the CDC Ethernet driver. It may need manual configuration.

Is the Huawei E303s-2 locked to a specific carrier?

Some units may be locked. Check with your provider or use an unlock code.

USER MANUAL E303s-2 HUAWEI

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Table of Contents:

The Tattoo Prepaid Broadband Kit 2

System Requirements 3

Getting to Know Your Tattoo Prepaid Broadband Kit 3

Preparations 4

Installation and User Interface 5

Tattoo User Interface 6

SMS Features 8

Call Feature 10

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Getting to Know Your Tattoo Prepaid Broadband Kit

1. USB Connector
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