# How can I test my guidebooks on the smarthone?

## A) Register smartphone devices for testing

*Open your backend system and open your account settings under "Account".* 

![](https://4249329-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FE2a888ltdx6dUekSgs4U%2Fuploads%2FVN09u0sZe8FHPbcOBOER%2Fgrafik.png?alt=media\&token=52b0e4c6-971c-47b8-8a30-2bef0f5cab34)

*You can find the device IDs of your test devices under "Sharing - Settings". The products can only be tested free of charge on the devices specified here.* 

![](https://4249329-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FE2a888ltdx6dUekSgs4U%2Fuploads%2FlGES4sOOk7yeiV0TGRvI%2Fgrafik.png?alt=media\&token=406647eb-4bf9-4dd6-a388-37062498295c)