3G2 to MP4 Converter

How to Convert 3G2 to MP4 Online

1. Upload Your 3G2 File: Drag and drop into the upload area or click "Add Files" to select a .3g2, .3gp2, or .3gpp2 file from your phone backup, SD card, or computer. Batch conversion is supported, and .3gp files (the GSM cousin) are also accepted.
2. Pick Video Codec and Audio Codec: Under Video Codec the default is H.264 (recommended for MP4 — universal playback on every modern OS and browser). H.265/HEVC, AV1, VP9, VP8, and MPEG-4 Part 2 are also available. For audio, AAC is the default; MP3, AC3, and Opus are available. AAC is the right choice unless you have a specific reason to pick another.
3. Set File Compression and Resolution (Optional): Choose a Quality Preset (Highest to Lowest), or pick Target File Size %, Specific File Size (MB/KB), Constant Bitrate (CBR), Variable Bitrate (VBR), Constant Quality (CRF), or Constraint Quality. Under Video Resolution keep the original (recommended for legacy 176×144 / 320×240 source) or pick a preset (1080p, 720p, 480p, 360p). Under Trim, set Start Time and Duration in seconds or HH:MM:SS.sss to extract a clip.
4. Convert and Download: Click Convert. Files process through your browser session — no sign-up, no watermark, no e-mail required.

Why Convert 3G2 to MP4?

3G2 is the multimedia container that 3GPP2 published in January 2004 for CDMA2000 mobile networks — the format every Verizon, Sprint, U.S. Cellular, and Alltel camera phone wrote to its memory card from roughly 2004 through the early smartphone era. Like its GSM cousin 3GP, 3G2 is built on ISO/IEC 14496-12 (MPEG-4 Part 12), so it's structurally close to MP4 but with extras specific to CDMA voice codecs (EVRC, QCELP, SMV, VMR-WB) that modern players and editors don't recognize. Converting to MP4 with H.264 + AAC gets the video out of the legacy CDMA codec ghetto and into a format every smartphone, editor, and browser plays natively.

• Verizon flip-phone video recovery — LG VX8300, Motorola Razr V3c, Samsung SCH-A990, and similar CDMA handsets recorded clips at QCIF (176×144) or CIF (320×240) into .3g2. Once the carrier shut down CDMA networks (Verizon's 3G CDMA sunset completed at the end of 2022), the phones themselves no longer work — recovering the clips from old SD cards and converting them is often the only way to keep that footage viewable.
• Family video archival — Birthday parties and first steps captured on a 2007 Verizon phone are stuck in a container modern editors stumble on. MP4 + H.264 is the lossless rewrap for long-term preservation.
• Editing in modern NLEs — Premiere Pro, DaVinci Resolve, Final Cut Pro, and iMovie all accept MP4 cleanly. They will technically open .3g2 via FFmpeg-based importers but often fail on the QCELP/EVRC audio track; an MP4 with AAC audio just works.
• Sharing without compatibility excuses — YouTube's supported-format list explicitly names 3GPP but not 3GPP2, and Instagram, TikTok, Twitter/X, and Facebook Reels reject .3g2 outright. MP4 is the universal pass.
• Web embedding and HTML5 video — <video src="...mp4"> plays in every browser; <video src="...3g2"> does not, even though both containers share an MPEG-4 Part 12 foundation.
• Need just a clip? Use Cut Video before or after conversion to trim down a long recording without re-encoding.

3G2 vs MP4 — Format Comparison

Codec and Quality Quick Guide

Frequently Asked Questions

Why won't my 3G2 file play in QuickTime / VLC / Windows Media Player?

The container itself usually opens, but the audio track is the problem. CDMA phones often encoded voice using EVRC, QCELP (13K), or SMV — codecs published by 3GPP2 for cellular voice that modern desktop players do not bundle. VLC handles most of these via its built-in decoders; QuickTime and Windows Media Player typically cannot. Converting to MP4 + AAC rewrites the audio into a codec every player understands.

Is the conversion lossless?

The container repackaging is essentially free, but the codecs are different on both sides. The video re-encodes from H.263 or MPEG-4 Part 2 (typical 3G2 source) into H.264, which is a lossy step. The realistic loss is minor — these source files are already at extremely low bitrates (often 50–250 kbps) so re-encoding at a high CRF (18–20) preserves what little detail was there. To minimize loss, keep the original resolution and pick CRF 18 under Constant Quality.

Should I upscale 176×144 footage to 1080p?

No. Upscaling a 176×144 source to 1080p makes the file 47× larger without adding any real detail — every pixel is invented by the scaler. Keep the source resolution (or 2× nearest-neighbor at most for crisper big-screen viewing) and let the playback device upscale. If you must enlarge for editing, use a dedicated upscaler (Topaz Video AI, FFmpeg's scale with lanczos) rather than a one-pass converter.

My file is .3gp, not .3g2 — does this tool handle it?

Yes. The xconvert 3G2 converter accepts .3gp (GSM/3GPP) alongside .3g2 (CDMA/3GPP2) because the two containers are nearly identical at the byte level — both inherit from ISO/IEC 14496-12. If your file is .3gp specifically, the dedicated 3GP to MP4 page applies the same pipeline.

Why does my 3G2 sound like a phone call?

Because it was recorded by one. CDMA flip phones used the same EVRC/QCELP narrowband voice codecs for video clips that they used for calls — typically 8 kHz sample rate, 8 kbps. There is no signal above 4 kHz to recover. The MP4 output will sound the same; no converter can add audio bandwidth that was never captured.

Will the converter strip or change the timestamp?

The xconvert pipeline preserves the encoded creation time when present in the source mvhd atom, but many CDMA phones wrote an incorrect or zero timestamp. If you need the original capture date, check the file's modification time on the original SD card or the EXIF-like metadata in any accompanying .dat thumbnail — those are usually more reliable than the in-container timestamp.

Can I batch-convert a whole folder of clips off an old phone?

Yes. Drag the entire folder onto the upload area; each file converts independently with the same settings you selected. For a large archive (50+ clips) it's often faster to set the Quality Preset once than to fine-tune CRF per clip — quality across a single phone's recordings is consistent enough that one setting fits all.

How is this different from just renaming .3g2 to .mp4?

Renaming changes the extension only; the file's internal ftyp atom still says 3g2 and the audio track is still EVRC or QCELP. Some players sniff the actual container and play it; many refuse based on the extension mismatch; and editors will still fail on the audio codec. A real conversion rewrites the container ftyp to isom/mp42 and transcodes the audio to AAC — that's what makes the file portable.

Want to compress the MP4 output further?

The default settings produce a small MP4 since the source is already low-bitrate. If you need a smaller file (e.g. to fit a strict messaging cap), run the result through Compress MP4 — set Target File Size % and the converter scales bitrate to hit it.