Media-convert

• 1). Load the Media-convert website in any Web browser. Click "Choose File" and track down the AVI. Media-convert restricts the user file upload size to 200MB.
  
  
• 2). Select "AVI" as your input format. Next, select "3GP" as your target format in the dropdown menu.
  
  
• 3). Click the "OK" button to create the 3GP file. Afterward, click the download link to begin your file download.
  
  

Mediaconverter

• 1). Load Mediaconverter's website in any Internet browser.
  
  
• 2). Click the "Upload a file" button and find the AVI. Afterward, choose 3GP for your output format. Mediaconverter limits the upload size of a file to 100MB.
  
  
• 3). Click "Start" to create your video file. After the conversion concludes, click the download link to receive the 3GP.
  
  

Zamzar

• 1). Access Zamzar in any Web browser.
  
  
• 2). Click "Choose File" and sniff out the AVI you want to convert. Then, pick out 3GP for your target format. Free users of Zamzar can only upload files 100MB or smaller.
  
  
• 3). Give Zamzar your email address and pick "Convert." You'll soon receive an email with your 3GP housed inside a download link.