Have bought a Poco M5 pro 5g as the old mobile Redmi 8 is not working properly due issues like screen ghost hanging in between. I installed WhatsApp in new phone & registered with same number as using in old phone (have put WhatsApp number SIM in another device other than these 2) & opened the chat transfer screen in old phone & scanned the QR code which appeared in new phone. But transfer speed is too slow & it got cancelled & seems their implementation of transfer is not proper. But now WhatsApp logged out in older phone & when i logged in again lost the old chats as well, though the yesterday Google drive backup showing in Chat backup page. Have backed up database file to computer also. It doesn't matter if I lose the recent 1 or 2 day chats but will be better if able to restore chats prior to that. Also when registering WhatsApp sending OTP through call is giving error message though I'm able to make & receive calls in the device which has the WhatsApp number SIM