I Need a video Converter for ZTC S501

[i_am_ron]

I have tried all abt of the converter shown in this forum. but, every file is invalid shown in my mobile. plz help me.
My set's configuration is



Product Description
Key Features
- 3.0" touch screen; 262k color TFT LCD; 240x320 pixels
- Dual SIM cards, dual standby (work together)
- Connectivity: Bluetooth wireless technology
- Dual Cameras: 2.0 megapixel with x5 digital zoom
- Video record
- FM radio in hands-free mode
- Dual speakers with 3D stereo surroundings
- Built-in MP3 Player: mp3, wav, amr, acc
- Media Player: MPEG4, H.263, 3GP
- Brower type: WAP 2.0
- External memory: microSD (max up to 2GB)
- 64 Polyphonic ringtones; MP3 ringtones
- MMS (Multimedia Messaging)
- SMS long (text messaging)
- Voice recorder

Basic Specification
- Network: GSM 900/1800MHz, support GPRS
- Dimension: 120x58x19mm
- Weight: 121g with battery
- Battery: 3600mAH
- Standby time: 400 hours (depends on network)
- Talk time: 400 minutes (depends on network)
- USB mass storage
- USB support
- Available color: black
- Available language: English/Russian/Arabic/Vietnamese/Thai/Turkish/French/Simplified Chinese

Organizer
- Hand writing recognition
- Pre-loaded games
- Alarm clock
- Calculator
- Calendar
- Stopwatch
- E-book reader
- World clock
- Flight mode
- Tasks
- Currency converter
- Unit converter

Accessories
- 2 x Batteries
- 1 x Charger
- 1 x Stereo Headset
- 1 x 120M microSD Card
- 1 x USB Cable

Now tell me that what should I have to do?

I dont want to play 3gp format. any other format like mp4, avi can be excepted, but the video must be 320*240 n audio must be 128 kbps.

Please, help me.