Nokia has officially announced three new windows phones Lumia 630, Lumia 635 and Lumia 930 are the first devices running windows phone 8.1 operating system, ClearBlack delivering sharp and crisp quality images perfect for outdoor also used with gloves.

Nokia Lumia 930 has 5-inch multi-touch OLED display screen with 1920 x 1080 pixels resolution, 2.2GHz Qualcomm Snapdragon 800 quad core processor, 2GB RAM, 32GB of storage, 20MP rear with dual flash and 1.3MP front camera, 4G LTE, 2420mAh battery provides 15 hours talk time and 75 hours music playback.

Nokia 930 will be available from June at price of $599 in orange, green, black and white colors.

Nokia 630 and Nokia 635 have same phones but Lumia 635 support 4G LTE connectivity while Lumia 630 comes with dual SIM and 3G support.

They have 4.5-inch multi-touch IPS display screen with 854 x 480 pixels resolution, 1.2GHz Qualcomm Snapdragon 400 quad core processor, 512MB RAM, 8GB of storage, 5MP rear camera, 1830mAh battery provides 13 hours talk time and 58 hours music playback.

Nokia Lumia 630 will be available from May at price of $159 for single SIM version and $169 for dual SIM version while Nokia Lumia 635 will be available from July at price of $189 are comes in orange, green, yellow, white and black colors.

Samsung has officially announced various models of the range including Galaxy Tab 4 7.0, Galaxy Tab 4 8.0 and Galaxy Tab 4 10.1 have sleek and light weight design ideal for viewing and sharing content, next generation tablet providing exceptional multimedia experience, Multi Window functionality allow users to seamlessly switch between widows and apps.

It has features like Group Play to share and play music, games with friends, Link to share and play contents across smart devices and WatchON to watch shows and movies on any device anywhere.

Samsung Galaxy Tab 4 7 has comes with 7-inch display screen with 1280 x 800 pixels, dimension 186.9 x 107.9 x 9 mm and weight 276 grams.

Samsung Galaxy Tab 4 8.0 has comes with 8-inch display screen with 1280 x 800 pixels resolution, 4450mAh battery, dimension 210 x 124 x 7.95 mm and weight 320 grams.

Samsung Galaxy Tab 4 10.1 has comes with 10.1-inch display screen with 1280 x 800 pixels, 6800mAh battery, dimension 243.4 x 176.4 x 7.95 mm and weight 487 grams.

These all models of Samsung Galaxy Tab 4 have 1.2GHz quad core processor, 1.5GB RAM, 16GB of storage, 3-mega pixels rear camera and 1.3-mega pixels front facing camera, Android 4.4 KitKat operating system, 3G, Wi-Fi and Bluetooth, GPS.

These Samsung Tab 4 will be available from June in black or white colors but price not unveils yet but $399 expected price for 10-inch model.

Lenovo has silently announced three low cost A Series android tablets A7-30, A7-50, A8 and A10 are delivering Dolby enhanced audio experience with dual front speakers, powerful quad core processor for smooth video playback and gaming, HD display for sharp text and web pages.

Lenovo A7-30 has 7-inch display screen with 1024 x 600 pixels resolution while Lenovo A7-50 has 7-inch IPS display screen 1280 x 800 pixel resolution, 3450mAh battery, dimension 7.8 x 4.8 x 0.4 inches and weight 11.2 ounces.

Lenovo A8 has 8-inch IPS display screen with 1280 x 800 pixels resolution, 4200mAh battery, dimension 8.5 x 5.4 x 0.35 inches and weight 13.7 ounces.

Lenovo A10 has 10.1-inch display screen with 1280 x 800 pixels resolution, 6340mAh battery, dimension 10.4 x 6.9 x 0.35 inches and weight 1.2 pounds.

These Lenovo A Series tablets have 1.3GHz MediaTek MT8382 quad core processor, 1GB RAM, 16GB of storage while A7-30 has 8GB storage, 5MP rear camera but A7-30 has no rear camera, 2MP front facing camera while A7-30 has 0.3MP, Wi-Fi, Bluetooth, SIM card support allow to connect with family and friends, GPS and Android 4.2 Jelly Bean operating system.

Lenovo A7, A8 and A10 will be available from May in US and UK at price of £99.99/$129, £139.99/$179 and £169.99/$249 respectively.