There are many smart device available priced under Rs. 5 K but I would like to suggest you with some of the best from them. I have mentioned the two best smart device priced under Rs. 5 K. Go through the details given below to know more:
Micromax Unite A092 (Rs. 4,500)
It is an awesome device which comes packed with many features which are expected by a good smart device. It was released in the month of June, 2014. It comes with a 4-inch IPS display with the resolutions of 800 x 480 pixels which gives a great view to the users. It runs on Android 4.3 Jelly Bean which doesn't seems to be good at present but it will give you an advantage to play Android games on this device. It runs on 1.2 GHz quad-core Qualcomm Snapdragon 200 processor processor with 1 GB of RAM so that it can always give a smooth performance to the users. It comes loaded with 8 GB of internal storage space and the external storage space can be expanded using microSD card up to 32 GB so that users need not to worry about the storage space in this awesome device. It is a primary camera of 5 MP so that users can click photos in a clear view and it also have a secondary camera of 0.3 MP so that users can use video chatting feature on this device. It is powered by a long continuous usable battery of Li-ion 1,500 mAh so that users can use it continuously for long time. It supports 3G network, Wi-Fi, Bluetooth 4.0 and GPS as its connectivity features.
It is available on various online mega stores and you can but it just at Rs. 4,500. It doesn't let your money go waste, it gives value to your money as it comes with many awesome features at such a low cost.
Lenovo A680 (Rs 4,785)
It comes with a great display. It comes with the medium size screen of 5.0 inches with a resolution of 854 x 480 pixels which gives a better look to the users in comparison with many other devices. It was released in the month of March, 2014. It runs on Android 4.2 Jelly Bean so that users can play Android games. It runs on quad-core MediaTek MTK6582 Cortex A7 processor clocked at 1.3 GHz processor with 1 GB of RAM so that it can always work smoothly. It comes loaded with the internal storage space of 4 GB and the external storage space can be expanded using microSd card up to 32 GB. It comes with a primary camera of 5 MP with fixed-focus and a secondary camera of VGA quality. It offers 3G network, Wi-Fi, and Bluetooth as its connectivity features. It is powered by a 2,000 mAh li-polymer battery which can give you a talk time of 14 hours on 2G network. These were some of the features of Lenovo A680.
As per my thinking it has all the basic features expected by a good smart device. You can get this awesome device at various online mega stores at just the price of Rs. 4,785.
I have listed the two best smart devices as per your question you must go through both of them and select the best one according to you but as per my opinion Micromax Unite A092 will be the better choice in comparison with Micromax Unite A092 and Lenovo A680.
I find that the harder I work, the more luck I seem to have.