BlackBerry's recently released smartphone, BlackBerry Z10 has surely made a big impact in the smartphone market across the world. And, now some of the latest rumors suggest that BlackBerry has more shockers in its plan to surprise the world.

According to some screenshots spotted on Twitter, the company might be planning to bring out a tablet and a large screen smartphone into the market somewhere this year.

The picture looks like it is taken as a screen shot from some presentation slide but it shows alleged upcoming devices from BlackBerry.

In the first and the second quarter of this year, the picture shows the already announced all-touch BlackBerry Z10 and a QWERTY keypad BlackBerry Q10 smartphones. But, when it comes to the third quarter, BlackBerry may surprise everyone with the launch of a BlackBerry 10-based tablet.

The picture released by a Twitter user, @BB10Leaks, puts a phablet-sized all-touch smartphone between the last quarter this year and the first quarter of the next year. The smartphone is named as U10.

However, all these details given in the leaked image are part of rumors and there is no official release or statement from BlackBerry about any of the details.

Apart from the U10, the picture also included a QWERTY keypad device marked as R10. The device's release timeframe is in the second quarter next year.

Recent reports suggest that one of the four major carriers in the U.S., Sprint has chosen not to carry the first BlackBerry handset running the BlackBerry 10 operating system. Instead of carrying BlackBerry Z10, Sprint is going to carry the Z10 successor, BlackBerry Q10, which is going to sport a hardware QWERTY keyboard.

Other U.S. carriers like AT&T, Verizon and T-Mobile have already decided to carry the all-touch BlackBerry Z10 devices. BlackBerry's Q10 devices are expected to arrive in the U.S. somewhere in the second quarter.