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Supports: HEIC
HEIC is the HEVC-based still-photo format iPhones save by default; 3G2 (3GPP2) is the small, legacy video container built for CDMA mobile phones. This converter doesn't add motion — it holds your single HEIC photo on screen as a still frame for a duration you choose, with no audio, and wraps it in a 3G2 video file. It's a niche conversion, useful mainly when an old CDMA-era handset or a 3G2-only player will accept a video clip but not a modern image. Your file is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.
| Property | Value |
|---|---|
| Standard | HEIF — ISO/IEC 23008-12 (MPEG-H Part 12) |
| First adopted | Apple iOS 11, 2017 (default iPhone photo format) |
| Image codec | HEVC (H.265) |
| Container holds | Single image, thumbnails, or image sequences (e.g. burst, cinemagraph) |
| Color depth | Often higher than 8-bit on recent camera hardware |
| Best for | Compact, high-quality photo storage on Apple devices |
| Property | Value |
|---|---|
| Standard | 3GPP2 file format, based on ISO/IEC 14496-12 (MPEG-4 Part 12) |
| Defined by | 3GPP2, for 3G CDMA2000 multimedia services |
| Video codecs | H.263, MPEG-4 Part 2, H.264/AVC |
| Audio codecs | AMR, AAC, plus CDMA-specific EVRC, QCELP (13K), SMV, VMR-WB |
| File extensions | .3g2, .3gp2, .3gpp2 |
| Designed for | Low storage and bandwidth on mobile phones |
| Best for | Playback on old CDMA-network handsets and 3G2-only devices |
No. A HEIC file is a single still photo, so the output is a one-shot clip that shows that photo motionless for the duration you set, with no audio. There is no animation, panning, or sound — it is your image displayed as a static frame inside a 3G2 video container.
Both are structurally based on the ISO base media file format (MPEG-4 Part 12) and share video codecs like H.263, MPEG-4 Part 2, and H.264. The difference is the target network: 3G2 was defined by 3GPP2 for CDMA2000 phones and adds CDMA-specific audio codecs such as EVRC and QCELP, while 3GP was defined by 3GPP for GSM/UMTS phones. If your target device is a GSM-era handset, use our HEIC to 3GP converter instead.
3G2 was designed to keep file size and bandwidth low for old mobile phones, and many target players expect small frames. If you select a fixed-resolution preset, the photo is scaled to fit it, so a large HEIC photo is usually downscaled. Device-specific maximum resolution and file-size limits vary, so to stay compatible with an old handset, choosing a small resolution preset is often the safest option.
Yes. The Duration control in Advanced Options sets how many seconds the still frame plays. The default is 5 seconds per frame; shorter durations make a smaller file, while longer durations extend the clip without changing the picture, since the same single image is held for the whole time.
For most uses, no — CDMA networks that 3G2 was built for have largely been retired (for example, Verizon shut down its 3G CDMA network at the end of 2022). It remains useful only when you need a clip for an old CDMA-era phone, a legacy player, or software that specifically accepts 3G2. For a modern, widely supported video, convert your photo with our HEIC to MP4 converter instead.
Some old phones and players can open a short video but cannot read a HEIC image, which uses the newer HEVC codec. Wrapping the still photo in a 3G2 clip gives those devices something they can play. In our testing, a single HEIC photo at a 5-second duration produced a very short, low-bitrate 3G2 file only a few hundred kilobytes in size. If you just want a viewable image rather than a video, our HEIC to JPG converter is the simpler choice.