Tagwriter for Android

Just got the NExT installed. When using TagWriter I am trying to erase tags. I get two options, Erase to factory default, or Erase and Format as NDEF. Which one should I be using to avoid issues with my tag and to make sure it is able to be read by all/most mobile devices?

Normally you shouldn’t need to format your NExT, Just write a new Dataset
But if you are experiencing issues
You can use either option, If you are planning on setting NDEF datasets, just go for Erase and Format as NDEF.