It uses high compression to fit video into tiny storage spaces (often just a few megabytes).

Many sites offering "baixar pacote" (download pack) files wrap malicious software inside the .zip. Once you extract the file on an Android device or PC, it can install spyware or ransomware.

Because of the compression, the "Extra Quality" mentioned in many download titles is usually a misnomer; 3GP is significantly lower resolution than modern MP4 or WebM files. Why "Zip" Packs are Risky

If you are looking for media for your phone, follow these safety guidelines:

The .3gp container format was developed by the Third Generation Partnership Project (3GPP). It was designed specifically for 3G mobile phones to decrease file size and bandwidth usage.

Never download compressed archives from sites you don't trust.

Today, there is very little reason to download 3GP packs. Modern smartphones (Android and iPhone) are optimized for and WebM formats.

It was the only format supported by older Nokia, Motorola, and Sony Ericsson devices.

Even at low bitrates, MP4 looks significantly better than 3GP.