3G2 to WAV Converter

Convert 3G2 to WAV: What This Tutorial Covers

This walks through pulling the audio out of a .3g2 clip — the format old CDMA phones from Verizon and Sprint recorded to — and decoding it to WAV, an uncompressed PCM file that opens in any audio editor without needing a codec. It also explains what fidelity to expect, because 3G2 audio is usually narrowband CDMA speech, and sets you up for the cases where a plain conversion isn't enough.

How to Convert 3G2 to WAV

1. Upload Your 3G2 File: Drag and drop your .3g2 clip onto the page, or click "+ Add Files" to browse. The tool also accepts .3gp files, and you can queue several at once.
2. Set Audio Sample Rate: Leave it on "Original" to keep the recording's native rate, or pick a standard rate like 44100 Hz if your editor expects one. Resampling changes the sample grid only — it cannot recover detail the source never recorded.
3. Set Audio Channel: Leave on "Original," or force Mono. Most 3G2 voice clips are already mono, so forcing stereo just duplicates the channel and doubles the file size for no gain.
4. Convert and Download: Click "Convert" and download your WAV. No sign-up, no watermark. The output WAV plays in any audio editor or media player.

Walk-through: Why 3G2 Audio Decodes the Way It Does

3G2 (3GPP2) is the CDMA cousin of 3GP. 3GP was the GSM format used by carriers like AT&T and T-Mobile; 3G2 was defined by 3GPP2 in January 2004 for CDMA2000 networks, which in the US meant Verizon and Sprint feature phones. The difference that matters for audio is the codec set: where 3GP leans on AMR, a 3G2 file's audio stream is typically EVRC, EVRC-B, EVRC-WB, 13K (QCELP), SMV, or VMR-WB — Qualcomm's CDMA speech codecs — though camcorder-style clips may instead carry AAC.

That codec choice decides what your WAV can sound like:

• If the source is EVRC or QCELP (a voice memo or recorded call): these are narrowband speech codecs. EVRC samples at 8000 Hz and runs around 8.55 kbit/s at full rate, carrying roughly the telephone speech band. Decoding to WAV stores those samples losslessly, but the frequencies a narrowband codec never captured cannot be added back by any format.
• If the source is EVRC-WB or VMR-WB (wideband speech): you get fuller voice with more presence than narrowband, still short of music-grade treble.
• If the source is AAC (typically video/camcorder audio): the decoded WAV is music-quality PCM, ready for editing.

In every case WAV is the destination because it is uncompressed linear PCM — no codec needed to open it — which makes a legacy phone recording portable and edit-ready even when the original audio was already lossy on the device.

Common Errors and How to Fix Them

• "The WAV sounds muffled or telephone-like" — The source was almost certainly EVRC or QCELP narrowband speech (8 kHz). That is the ceiling the phone recorded at; WAV preserves it exactly but cannot add highs that were never there. This is expected for old CDMA voice clips, not a conversion fault.
• "The WAV file is huge compared to the 3G2" — WAV is uncompressed, so its size is fixed by sample rate, bit depth, and channels, not by how quiet the audio is. CD-quality stereo (44.1 kHz, 16-bit) is about 1,411 kbps, roughly 10 MB per minute. Keep Sample Rate and Channel on "Original," or convert 3G2 to MP3 if a small file matters more than lossless editing.
• "Upload is slow or rejected" — On a 3G2 it is rarely the audio; it is the video track inflating the file. The practical limit is upload size and time over your connection, not your device — a short clip uploads quickly.

When This Doesn't Work

If the .3g2 came straight off a phone's memory card and won't open, it may be truncated — older handsets sometimes left the file index unwritten when a recording was interrupted or the battery died, leaving the clip unplayable until repaired. Carrier-downloaded ringtones or media can also be DRM-wrapped, which blocks extraction entirely. And if you only need the picture or the video, not the soundtrack, convert the whole clip instead of extracting audio. For a 3GP file from a GSM phone rather than a CDMA 3G2, use 3GP to WAV, which handles the AMR codec path.

Frequently Asked Questions

Why does my 3G2 voice clip sound like a phone call even as a WAV?

Because the audio was recorded with a CDMA narrowband speech codec — usually EVRC or 13K (QCELP). EVRC samples at 8000 Hz and carries only the telephone speech band, by design, to save network bandwidth. Converting to WAV stores those exact samples without further loss, but the higher frequencies were never captured on the phone, so no format can restore them. WAV makes the clip editable and universally playable, not higher-fidelity.

What is the difference between 3G2 and 3GP for this conversion?

They are sibling containers split by network. 3GP was built for GSM phones (AT&T, T-Mobile legacy handsets) and carries AMR audio; 3G2 was built by 3GPP2 for CDMA2000 phones (Verizon, Sprint legacy handsets) and carries CDMA codecs like EVRC and QCELP. The extraction works the same way, but a 3G2's narrowband speech comes from a different codec family. If your file is a .3gp, use the 3GP to WAV tool instead.

Will the WAV be much larger than the 3G2 file?

Usually yes. WAV is uncompressed PCM, so its size depends on sample rate, bit depth, and channel count, not on the original's compression. A small 3G2 voice clip can become several megabytes as WAV. If size matters more than lossless editing, convert 3G2 to MP3 instead, or compress the WAV afterward.

Should I upsample 8 kHz CDMA speech audio to 44.1 kHz?

Only if a downstream tool demands a standard rate — for instance a DAW or mastering workflow that expects 44.1 kHz. Upsampling lays the existing audio onto a denser sample grid; it does not reveal detail the 8 kHz source never had, and it makes the file larger. If your editor accepts arbitrary rates, leaving Sample Rate on "Original" keeps the file smaller and skips an unnecessary resample.

Does WAV preserve the 3G2 audio losslessly?

The decode from EVRC, QCELP, or AAC to PCM is faithful, but the original codec already discarded data when the phone recorded — that loss is baked in and permanent. From the decoded PCM onward, WAV adds no further loss; it stores the samples exactly. So the WAV is a lossless container around audio that was compressed once on the device.

Are my uploaded 3G2 files kept private?

Files are 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. In our testing, a 30-second narrowband 3G2 voice clip (8 kHz, mono) decoded to a roughly 0.5 MB mono WAV; forcing 44.1 kHz stereo grew the same clip to about 5 MB, which is why we leave Sample Rate and Channel on "Original" by default.