Market researcher IDC has released its latest estimates on the smartphone and tablet markets. Global smartphone unit volumes have hit a new record. Market leaders Apple (NASDAQ:AAPL) and Samsung (OTC:SSNLF) are still at the top, although smaller players are growing much faster off smaller bases. Low-cost vendors in China in particular are enjoying the most growth.

On the tablet front, Android continues to gain traction in lower-end markets, with low-cost devices seeing continued growth. Apple was preparing for an iPad refresh in the third quarter, and consumers delayed Apple purchases as a result. The Mac maker is expected to bounce back this quarter following the release of new iPads. 

In this segment of Tech Teardown, Erin Kennedy discusses IDC's numbers with Jamal Carnette and Evan Niu, CFA.