Batch Device Data Wipe


Has anyone got any advice on wiping data on mobile devices?
We are looking to perform data wipe on a batch of mobile devices - looking to start with Android but ultimately want to perform a data wipe on all os
It is for re-selling mobile phones, so a old phone would arrive, and when we have 10 to do at once we would want to connect via cable to a pc and batch wipe all data so we can re-sell the phones to new customer.