Motorola has apologized for the inconvenience that its customers suffered due to crashing of its website during its Cyber Monday sale, and announced its decision to extend the deal for two additional days.

The phone manufacturer had announced tried to offer the SIM-free variant of its flagship Moto X smartphone for $350, at a discount of $150; but consumers' high enthusiasm for the handset quickly rendered the website largely unusable, which prevented many prospective buyers from taking advantage of the attractive deal.

Motorola Chief Executive Dennis Woodside said that the company misjudged consumers' overwhelming demand for the Moto X smartphone, which was significantly greater than the company's expectation.  He also admitted that the company's pre-sale website testing wasn't sufficiently extensive.

He apologized for the downtime, and promised that the special deal would be back on Wednesday, and the same offer would again be made available next Monday.

Announcing the decision, Woodside said, "We're also extending the 30% off offer on accessories to these two days.  Please note that MotoMaker. com will open up for regular business tomorrow (Tuesday) . as we restore our promotional prices for Wednesday and Monday."

The Motorola Moto X smartphone for Verizon, Sprint and AT&T is currently posted as $0.01 with a two-year service contract.