If your old phone still has WhatsApp data (chats, photos) from 2019 or earlier, here is how to save it before the phone dies.
If you found a website or video claiming “WhatsApp 2.3.6 WORKING 100%” – report it as misleading. Do not download the file. Whatsapp Download Apk Android 2.3.6 WORK
Telegram dropped support for Android 2.3 in 2021, but the final version still works partially. If your old phone still has WhatsApp data