What would happen if my Bandwidth is 0?

If you are doing a lot of transactions, you need additional Bandwidth points. You can obtain more by freezing/unfreezing your TRX (about Freezing feature, infinito wallet is still not supported yet) for Bandwidth or wait untill next 24hrs for getting 5000 bandwidth.

If you do not have enough Bandwidth points, your TRX will be deducted as transaction fee.