i need to transfer whatsapp messages from lumia 1020 to microsoft lumia 532.i have created backup from inside whatsapp application. but the problem is their is no SD card in 1020. i installed whatsapp in my new phone but there is not any restore option there.what should i do?
First, make sure that you're using the same phone number (same SIM card) since you can't sync/restore your messages using another account.
According to the WhatsApp FAQ:
WhatsApp automatically makes backups of your chat history every day at 4 AM and you can uninstall and reinstall WhatsApp to restore messages from this copy. If you are unable to restore your chats, unfortunately, we can not restore your chats, contacts or multimedia files for you.
So, granted that you're using the same phone number the backup/restore should be done automatically. As a matter of fact, this is what happened to me.
Other than, remember that you have the option to export your conversations to .txt format by following the next steps:
1. Open the chat you wish to export. 2. Tap More > info or group info. 3. Tap More > email chat history.