What can you do with 30GB of data? AuthorMaria McCabe. Posted01/06/17. Share. So you've just signed up to iD, the flexible network. You are about to avail of our generous data allowance of 30GB per month as part of your plan. But what exactly can you do with 30GB of data? Our handy infographic below gives you a good idea... and if you need more 4G data to do more of whatever you do, iD is the flexible network that lets you be you. You decide what you want, when you want. Do if your plans change, you can change you plan in MyiD.