SCHAUMBURG, Ill. ( TheStreet) -- Motorola's ( MOT) decision to split into two companies proved popular with investors on Tuesday, driving the firms' shares northward.

Both Motorola Mobility ( MMI) , which is trading on the New York Stock Exchange under the ticker symbol "MMI," and Motorola Solutions ( MMS), which is trading under "MSI," enjoyed a share boost during their first day of trading. Phone shop MMI climbed $1.95, or 6.3%, to close at $33.12 after hitting a high of $33.45.

MSI, which is focused on enterprises and networks, climbed $2.62, or 7%, to close at $39.77, after hitting a high of $39.99 earlier in the day.

The split, driven by Motorola's desire to offer a less complicated picture to investors, garnered a positive response on Wall Street at a time when the smartphone and tablet markets are booming.

Motorola Mobility CEO Sanjay Jha, who rang the opening bell at the NYSE, told TheStreet that high-end smartphones will be a key area of focus in 2011.

The handset maker, which competes with Apple's ( AAPL) iPhone, is expected to launch its Droid Xoom -- an Android-based tablet -- at the Consumer Electronics Show in Las Vegas this week, along with new smartphones.

Jha refused to divulge specific details of Motorola's CES press event but reiterated his company's commitment to Google's ( GOOG) Android operating system. "I think that Android has proven itself to be the fastest-innovating ecosystem in the marketplace," he said. "We absolutely have to win in that marketplace."

The electronics giant first announced its plans to split into two companies in March 2008 but was forced to delay this effort as a result of the recession. Last February the firm confirmed that it was targeting the first quarter of 2011 to complete the separation.

--Written by James Rogers in New York.

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