How to edit JAVA .jar apps, Create modded or handler apps (basic tutorial)

I have modded and uploaded a lot of JAVA Apps for this blog. You may think, How these apps are modified. Many users have requested me to post a tutorial on "How to  edit JAVA apps". Thus you can create your own Handler mods and apps. Thus you can hack your networks for free Internet and anonymous surfing! Here I will explain how to edit Name, version etc. of any JAVA .Jar app. Also, I will teach you how to change Icons, inside images etc. of apps. You can also ad frontquery, backquery etc. You will be also able to edit the title and strings inside the app (for eg: "Opera Mini" is the title which shows in the top of the app in Opera Mini).
Note: This is just a basic tutorial. For creating handler Menus, edit and add menu items, you need to learn j2me and it needs some complex algorithms. So, I will explain about them in m next part of this tutorial.
Lets start...
If your are reading this from mobile, It would be better to switch to your PC for better understanding.
Tools/ Softwares required
  • A Computer
  • A Compression Utility like Winzip, Winrar, 7Zip etc.
  • A Hex Editor (HXD hex editor is recommended)
  • A text editor (notepad is enough)
  • An image editor in case you want to edit icons, images etc.
and your brain!!

First, extract the .jar files you want to edit to a folder.
Now let's see how you can edit the files

1. To edit App name, version no., delete confirm message etc.
Open file (usually located in META-INF folder) using notepad.
There you can edit app name,  version etc.
Here is an example of UC 8.5 handler app which was modded by me.
Manifest-Version: 1.0
MIDlet-Name: UC85Hackingpalace
MIDlet-1: UC85Hackingpalace,/l.png,
MIDlet-Version: 8.5.0
MIDlet-Vendor: UC Mobile <Hackingpalace>
Mod-Version: 2.0.5
MicroEdition-Profile: MIDP-2.0
MicroEdition-Configuration: CLDC-1.0
MIDlet-Info-URL: http:/
ILD: 2
Handler4: 1
Handler5: e:/UcwebScr/
Handler8: 0
Handler10: Mozilla/5.0 (BlackBerry; U; BlackBerry 9800; en) AppleWebKit/534.1+ (KHTML, Like Gecko) Version/ Mobile Safari/534.1+
Handler11: 0
MIDlet-Delete-Confirm: More Handler Apps, Visit:
DHandlerM0: Custom
Hope you understand this.
Now save the changes. We can add the app later.

2. Editing icons,PNG images, inside images etc.
Article in progress.... come back later for complete article or subscribe to our feeds to get it in your email inbx when completed.
Update: New hander modding tutorial including 


  1. jayadeep sir , please make a symbion ucbrowser for airtel.l am useing n73me (s60v3).iam a big fan of you.plz plz make it soon.iam from kerala. Dont forgot plz plz plz.hop you are make it soon.thankyou. My name is ANAND.NV