The Sony Xperia M have such features that make it Xperia Z sibling such a looker, including the signature power key. It also has a hardware shutter key. The Xperia M also has a big and sharp screen and a dual-core Krait processor, plus 720p video capture with its 5MP camera.
Features:-

• Quad-band GSM/GPRS/EDGE and dual or quad-band HSPA support
• Also available in a dual-SIM variant, called Xperia M dual
• 21 Mbps HSDPA and 5.76 Mbps HSUPA
• 4" 16M-color TFT capacitive touchscreen of FWVGA resolution (480 x 854 pixels) at 245ppi
• Android OS v4.1.2 Jelly Bean
• Dual-core 1 GHz Krait CPU, Adreno 305 GPU, Qualcomm MSM8227 Snapdragon chipset
• 1 GB of RAM
• 4 GB of built-in storage (2 GB user available)
• microSD slot (cards up to 32GB supported)
• 5 MP autofocus camera, single LED flashlight, geo-tagging, touch focus, HDR, hardware shutter key; VGA front-facing camera
• 720p @ 30fps video capture
• Wi-Fi a/b/g/n, Wi-Fi hotspot
• Bluetooth 4.0 with A2DP
• NFC support
• ANT+ support for connecting low-power wireless sports accessories
• GPS with A-GPS; GLONASS
• PlayStation certified
• Accelerometer, ambient light and proximity sensor
• Standard 3.5 mm audio jack; Walkman music player with many audio enhancements
• Stereo FM radio with RDS
• microUSB port (charging)
• Built-in LED strip provides a breathing light and notification light
• 1,750mAh Li-Ion battery, user-replaceable