A paid app (cracked .cab available on archives) that supports ICQ, Jabber, and even Telegram via XMPP bridges. Requires a Jabber account.
Therefore, searching for with the hope of finding a current, working version of the app is a technical impossibility. The current WhatsApp server architecture does not recognize or allow connections from clients running on Windows Mobile 6.1. whatsapp messenger.cab for htc windows mobile 6.1
The messaging app launched its first Windows-compatible version only when was released in 2011. Because Windows Mobile 6.1 (used on older HTC devices like the HTC Touch Pro or Snap) is a completely different architecture from Windows Phone 7+, official .cab files from WhatsApp Inc. for that OS do not exist. However, for historical or research purposes, 1. The "WhatsApp.cab" Reality A paid app (cracked
"This program is from an unknown publisher. Do you want to continue?" The current WhatsApp server architecture does not recognize
You can find extensive historical threads on the XDA Developers Forum , where developers spent years trying to backport apps to HTC Windows Mobile devices.
If you are a hobbyist or collector wanting to install the app for archival purposes on an HTC device, the traditional process for installing a .cab file on Windows Mobile 6.1 is as follows: Whatsapp Messenger.cab For Htc Windows Mobile 6.1