The Nokia Lumia 520 is an affordable handset running Windows Phone 8. Thanks to a dual-core 1GHz processor, the interface is fairly smooth and the phone runs much faster than its predecessors, the Lumia 510 and 610 (both of which had single-core 800 MHz processors). Also, the RAM is doubled from a measly 256MB to a reasonable 512MB. Thus, apps like WhatsApp that were honestly unusable on the prior models works fairly well on the Lumia 520. Next improvement is the addition of a microSD card slot. The phone's back panel comes in bright youthful colours and is user exchangeable, thereby allowing you to change the look of your phone. There's a 5 megapixel autofocus camera at the back, that unfortunately doesn't have an LED flash. There's no front-facing videocall camera; that's a feature available in a version above — the Lumia 620. The most remarkable feature we thought in the phone was PhotoBeamer, which allows you to share photos with any web browser and even lets you control the slideshow from your phone itself! It comes with a 1420 mAh battery.
After much speculation of an Android-powered Nokia smartphone, the Nokia X was officially announced in February 2014. The Nokia X comes in the same colourful shells like the rest of the Lumia series, but runs something very different than Windows Phone inside. It’s Android; but not traditional Android like you know it. It is Android that’s void of all Google services; like Maps, Gmail, YouTube etc, that are replaced with Microsoft’s services. Its UI is also a cross between the Windows Phone’s Tile-based interface coupled with the Fastlane multi-tasking system found on the Asha 500 series. So what’s the benefit? Because of the Android base, Nokia says existing Android apps can be easily ported to the Nokia X software platform. There’s also the possibility of sideloading APK files directly. Nokia has their own app store to discover new apps for the Nokia X.
On the inside, the Nokia X has a 4-inch 800 x 480 pixel IPS display, a 1GHz dual-core Snapdragon S4 chip coupled with 512MB RAM. There’s 4GB of internal storage (Lumia 520 has 8GB), along with a microSD card slot to expand it further. There’s a lacklustre-sounding 3 megapixel fixed-focus camera at the back with no flash, and no front-facing camera for video calls. The Nokia X is a Dual SIM phone with 3G support. The Nokia X also comes with Nokia’s HERE maps with offline navigation, Nokia MixRadio streaming music service and one month of unlimited Skype-Out calls. A 1500mAh battery provides juice to the phone. The Nokia X2 is the successor to the phone and the Zenfone 4 is an Android competitor that you should look at.