Best Window Phones are:

Nokia Lumia 920

Specification:                                                       

Display Size:4.5"                                                                                            

Display Technology:Pure Motion HD

2G Talktime :18.6h 

3G Talktime :10.8h

3G Standby Time:46.0h

Music PlayBack Time:74h

 Camera: Primary 8.7MP , Secondary 1.3 MP

O.S:Microsoft Window Phone8

Processoe: Dual-Core 1.5 GHz,Snapdragon S4

Memory: Internal: 32GB , 1GB RAM  , Card Slot: NO

 

 

Nokia Lumia 820

 Specification:

                                      

Display Size:4.3"                                                                                            

Display Technology: AMOLED ,Clear Black 

2G Talktime :15.4h 

3G Talktime :8.1h

3G Standby Time:36.0h

Music PlayBack Time:61h

 Camera: Primary 8MP , Secondary VGA

O.S:Microsoft Window Phone8

Processoe: Dual-Core 1.5 GHz,Snapdragon S4

Memory: Internal: 8GB , 1GB RAM  , Card Slot: MicroSD,Upto 64 GB

 

HTC 8X 

Specification:  

                              

Display Size:4.3"                                                                                            

Display Technology: Corning Gorilla Glass2

Battery Life: Endurance Rating 31h

Music PlayBack Time:61h

 Camera: Primary 8MP , Secondary  2.1 MP

O.S:Microsoft Window Phone8

Processoe: Dual-Core 1.5 GHz Kraint

Memory: Internal: 16GB , 1GB RAM  , Card Slot: NO