There has been rumors that samsung is working on Z2 which is successor of Z1 which was launched last year. images of Z2 has already leaked and specs .According to leaked specs Z2 is expected to come with 540 x 960 PLS TFT-LCD coupled with 1GB of RAM powered by 32 it quad core processor. Runing on all new Tizen 3.0 User Interface and packed by 3000mAh battery
Today another image leaked shows that Samsung is working on Samsung Z which will be similar to Samsung Z but LTE model.The device has the same bezel and volume buttons as the Samsung Z1, but it does not have the additional Proximity / Light / Gesture sensors that we have seen on the rumoured Samsung Z2.
there are no details on when the device will be launched.