WhatsApp transfer to new Android can be done with the help of iCareFone Transfer App, Email Chat or SD Card.
Google Drive is not recommended to use for transferring WhatsApp to new phone.
Google Drive is not recommended to use because it lacks backup flexibility, cannot read/export WhatsApp backup, cannot transfer specific chats and also is considered less secure by many users.
iCareFone Transfer App is the most recommended option to transfer WhatsApp messages with ultra-fast transfer, no computer involvement and support for over 6000 Android devices.
Email Chat is also an easy way to transfer WhatsApp chats but it can only be used to transfer one chat at a time and cannot transfer large chats in a single attempt due to email size restriction.
Using SD card for transfer WhatsApp is an offline and secure transfer method but is time consuming and also not usable for Android models that don't support SD cards.
iCareFone Transfer App is the best solution due to its intuitive interface and complete WhatsApp transfer with no data loss.
One can transfer all WhatsApp data to new iPhone using iCareFone Transfer App without needing a computer.
If all WhatsApp messages are not transferred to new phone, it might be because of restoring an older backup.