Since you’ve removed all your passwords and protections for your phone, your data is left pretty much vulnerable. Anyone can extract the data on your device including your contacts, important documents, and even access to some of your personal and professional data points. So, it is best to remove all your data before handing over the device to the repair shop. But, before you remove your data, you may need to ensure that you can get it back once your phone is repaired. And for this backing up your phone is what you should be doing.
