SMS Deliverer

ZTE MF668: SMS compatibility and AT notes

A faster HSPA+ ZTE stick with the same driver-first caveat as the MF190 and less certain AT documentation.

3G USB stickHSPA+ up to 21.6 Mbps downlink, UMTS, GSMListed by the original site, not re-tested

Verdict

A faster HSPA+ ZTE stick with the same driver-first caveat as the MF190 and less certain AT documentation.

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

Specification and SMS behaviour

Chipset / module	ZTE MF668 stick (internal baseband chipset not verified)
Interfaces	USB 2.0. Serial ports via the ZTE dashboard/driver package.
Power supply	Not verified
AT command notes	The ZTE AT command set for this generation includes AT+CMGF/AT+CMGS; whether the MF668 firmware implements the full set is not verified.
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

Driver-first device: no dashboard package, no COM ports.
Do not assume the full ZTE AT set is present; probe AT+CMGF=? before configuring the application.

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

Does the MF668 support the full ZTE AT command set?

Not verified. The generation's set includes AT+CMGF/AT+CMGS, but firmware-level confirmation for this model is missing.

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