Microsoft Lumia 535  The Microsoft Lumia 535 is an entry-level smartphone developed by Microsoft Mobile that runs the Windows Phone 8.1 OS and is upgradable to Windows 10 Mobile. The phone features a 5-inch display. It is equipped with a 5 MP front-facing camera. It is the first Microsoft-branded phone to be used after its . On May 16, 2015, Microsoft released its successor, the Microsoft Lumia 540, with a better display and an improved camera. The Lumia 535 comes with a 5.0" IPS LCD display and 5 MP cameras on both the front and the back. The phone has 1 GB of RAM and 8 GB of built-in storage, and is powered by a quad-core 1.2 GHz Snapdragon 200 CPU and Adreno 302 GPU. Battery capacity is 1905 mAh and the phone is available in orange, green, white, black, gray and blue. The Lumia 535 ships with Windows Phone 8.1 Update 2 (through the Lumia Denim update) and is upgradeable to Windows 10 Mobile. Jim Martin from PC Advisor wrote: "We're fans of Windows Phone 8.1 but the Lumia 535 compromises in too many areas to make it a bargain at £100. You're better off with a Motorola Moto E or – if you want 4G – the EE Kestrel." Katharine Byrne from Expert Reviews wrote that "Microsoft's Lumia 535 is well-built, but poor battery life and a fussy touchscreen makes it frustrating to use." According to Microsoft, the Lumia 535 became the best-selling mid-range smartphone in Pakistan. Since the release, users have detected numerous problems regarding the phone's touch screen. Microsoft has stated that these problems are caused by a software bug and released an update in January 2015 to fix it. Another update in March partially fixed the issue and users who are still experiencing the issue are advised to contact Microsoft Care.