Convert 3GPP2 Multimedia (.3g2) to Mobile Video (.mobile-video) online for free. Fast, secure video conversion with no watermarks or registration.
Upload your .3g2 file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mp4 file when it's ready.
Mobile-optimized video is a generic preset targeting the broadest possible range of smartphones and tablets. Converting 3G2 to mobile video transforms old CDMA phone recordings into an H.264 MP4 file with settings balanced for universal compatibility — working on Android, iOS, Windows Phone, and legacy smartphones alike. The encoding targets the lowest common denominator to ensure playback on every mobile device manufactured in the last 15 years.
This conversion is ideal when you do not know which specific device will play the file. Instead of optimizing for a single platform (iPhone, Android, iPad), the mobile video preset uses conservative encoding parameters that guarantee playback everywhere: H.264 Baseline Profile, AAC-LC audio, and MP4 container with faststart.
When sharing old phone recordings with family or friends, you rarely know what device they will use to view the file. A grandparent might use an old Android phone, a cousin might have the latest iPhone, and an uncle might still use a Windows tablet. Mobile-optimized video provides a single output file that works on all of them without compatibility concerns.
The mobile preset also handles the aspect ratio and resolution considerations that generic conversion might miss. 3G2 files from CDMA phones used non-standard resolutions and aspect ratios that can display incorrectly on modern phones. The mobile video conversion normalizes these to standard dimensions with proper pixel aspect ratio metadata.
FFmpeg re-encodes to H.264 Baseline Profile Level 3.0 — the most universally supported mobile video encoding. Audio is transcoded to AAC-LC at 128 kbps with a 44.1 kHz sample rate. The MP4 container uses faststart for progressive playback over HTTP. Resolution is preserved from the source, and the pixel aspect ratio is set to 1:1 (square pixels) to avoid stretching on modern displays. The yuv420p pixel format is mandatory for mobile hardware decoder compatibility.
Quality is limited by the 3G2 source material, which was recorded at very low resolutions. The Baseline Profile encoding is slightly less efficient than Main or High Profile, but this trade-off ensures compatibility with the widest range of devices. For 3G2 source content, the efficiency difference is negligible since the source detail is already very limited.
| Device | 3G2 | Mobile Video |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
Mobile video conversion provides the safest, most compatible output for sharing old CDMA phone recordings across diverse devices. When in doubt about the recipient's device, this preset ensures playback everywhere.
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Toimii kaikkialla
| No |
8MB free, 50MB Nitro
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| Ominaisuus | 3G2 | Mobile Video |
|---|---|---|
| Koko nimi | 3GPP2 Multimedia | Mobile Device Video |
| Tiedostopääte | .3g2 | .mp4 |
| Paras käyttökohde | Mobile optimized | Universal mobile |