If not, is there a way to change it? Like, for example, by using the apploader to load an OS on with vendor.xml deleted?
thanks for your help!
No the splash screen will remain Bell and there is no legitimate way to remove it. There are non-legal tool in order to remove it.
Unlocking it will only allow you to use the phone on Rogers, the splash screen itself is built into the ROM.
Deleting vendor.xml will only allow you to load the an OS meant for another carrier onto a different carrier's device
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