SMS Deliverer

Huawei E303: SMS compatibility and AT notes

A HiLink-generation 3G stick: usable as a data adapter, not as a classic AT SMS modem in its shipping mode.

3G USB stickHSPA up to 7.2 Mbps downlink, UMTS, GSMListed by the original site, not re-tested

Verdict

A HiLink-generation 3G stick: usable as a data adapter, not as a classic AT SMS modem in its shipping mode.

Verification status: Listed by the original site, not re-tested

Specification and SMS behaviour

Chipset / module	Huawei E303 stick (internal baseband chipset not verified)
Interfaces	USB 2.0. HiLink mode: network interface with web UI, no serial AT ports.
Power supply	5 V from USB, up to 500 mA; consumption up to about 2.5 W
AT command notes	No AT port in the mode it ships in; HiLink web API only.
Concatenated (long) SMS	Not verified
Receiving SMS / OTP	Not verified
MMS	Not verified
Date tested	Listed on the original smsdeliverer.com hardware notes; not re-tested in this rebuild (2026-11)

Fields we could not verify are written as "Not verified" rather than filled with estimates.

Known failures and troubleshooting

HiLink mode is the blocker: without a COM port the desktop app cannot drive the stick for SMS.
If the stick shows up as a router at 192.168.1.1 or 192.168.8.1, it is in HiLink mode.

Data sources

Sources: the original smsdeliverer.com hardware notes for this model, plus vendor documentation. This rebuild did not re-test the device; unconfirmed fields are marked Not verified instead of being filled with guesses.

Other models

Guides

Questions about this model

Can the E303 send SMS through AT commands?

Not in the HiLink mode it ships in — that firmware exposes a web API, not serial ports.

Language