I need to change the mobile to tablets

Use same google account on both devices and contacts will be automatically synced between them.

Sure , you need to move all the contacts to table, the SaiyanGoku's idea is good ,

Shehab said:

For contacts, gmail will be the best and common way to transfer

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I prefer Facebook to data transmission compared to Gmail,

For contacts, gmail will be the best and common way to transfer

Yes using gmail is the best way.

Hello, you can use Gmail and phone to phone transfer software, these methods can sync the contacts between different devices.