Hi I want to eraser all data off my current phone if I was to erase all content and settings would any data be deleted off my sim? Thanks for your help

Erasing the data on your phone will not erase any data from the sim.

No. If you are selling or giving away the phone, the following may also help: What to do before selling or giving away your iPhone, iPad, or iPod touch - Apple Support

Seydae wrote:

Hi I want to eraser all data off my current phone if I was to erase all content and settings would any data be deleted off my sim? Thanks for your help

The iPhone doesn't store any personal data on the SIM. The only information on the SIM is information your carrier uses to activate the phone.