- 8.1 Denim OS
- 1.2GHz CPU
- 30GB Cloud Storage
Lumia 640XL has a Microsoft windows phone 8.1 with Lumia Denim. The processor is of QUALCOMM MSM8226 snapdragon400 and the CPU is at Quad core 1.2GHz cortex-A7. Internal memory is 8GB, 1GB RAM. The internal memory can be expandable to 128 GB. Micro SD card slot available.
One drive (30Gb cloud storage) online storage to save images, videos and documents. Sensor for accelerometer, proximity and compass features. SMS (threaded view), MMS, email, push mail, IM messaging features are also available.