Enable WhatsApp Web for older iPhones running iOS 4, 5, 6, 7, 8, using a Jailbreak tweak
Another tested and working solution is provided in the comments section - thanks kshu. This is not the ideal scenario, but it's working. You're basically installing an older version of WhatsApp and the DEB file for WhatsApp Web Enabler, the Cydia tweak used in the original tutorial. Here's the step by step guide for this solution:
1. Find iFile in Cydia and install it. The trial version is free and does enough for the task at hand.
2. Open Safari and click on
http://apt.thebigboss.org/repofiles/cydia/debs2.0/whatsappwebenabler_1.2-2.deb, then choose "Open in iFile", then choose Installer. This will install WhatsApp Web Enabler via iFile.
At this point, using the latest WhatsApp version won't work with WhatsApp Web Enabler, so you must downgrade WhatsApp to version 2.17.2. You'll need the 2.17.2 IPA file for WhatsApp. The easiest way is through AppCake, as detailed below.
3. Open Cydia and add the iPhoneCake repo, under Sources: Cydia.iPhoneCake.com.
4. Search and install AppCake and AppSync Unified. They are both within this repo.
5. Open AppCake and search for WhatsApp. Tap on previous versions and install 2.17.2.
That's it. WhatsApp with Web/Deskop is now working.
Update 1: The required Cydia package is currently unnavailable in the BigBoss repo, so this guide below does not work at this moment. The developer of WhatsApp Web Enabler got all his tweaks removed from the BigBoss Repo: Source, Reddit discussion about this.
We'll edit again once we find alternative options.
Original article follows:
As you know, WhatsApp Web is now available natively for iPhones running iOS 8.1+. That's fine if your device iOS is up-to-date, but older iOS devices, such as iPhone 4 who can't update past iOS 7, are left out. This is where this guide comes in handy.
In this tutorial we'll show you how to add WhatsApp Web Enabler from Cydia, a tweak that will enable the WhatsApp Web feature for any jailbroken iOS device running iOS 4 to 8.x.
The WhatsApp Web Enabler tweak will simply enable the native WhatsApp web service in WhatsApp and will block the jailbreak check for the WhatsApp app only.
The step-by-step guide to enable WhatsApp Web on older iOS devices:
2. If your device is jailbroken, you'll have Cydia added to your Home Screen (Springboard). Open Cydia.
3. Go to Sources and make sure the BigBoss repository is added there. If not, follow the tutorial below, then continue with step 4.
5. Once you've found it, tap Install, then Confirm on the next screen.
6. At the end of the procedure, you'll be prompted to Restart SpringBoard. Do so.
7. Once you're back on the Home Screen, you can open WhatsApp and go to the Settings tab. You'll find there the option to use WhatsApp Web, explained in detail in this tutorial.
You can watch the same tutorial in the video below.
a. On the Cydia main screen, scroll to More Package Sources.
b. Under Default Sources you should see the BigBoss repo. Tap on it and then tap OK to add this repo as a source.
If method A did not work, then you can do this:
a. On the bottom bar, go to Sources and tap Edit > Add.
b. Enter the BigBoss repo URL http://apt.thebigboss.org/repofiles/cydia/ and tap Add Source.
Done. Leave a comment with your suggestions or questions.