Keep same ECID as same UV when switching mobile phone

Hi,

Understand that if customer re-install or fresh install the app on the new phone, a new ECID will be generated and thus counted as a new UV.

But what about those cases when the app is transferred from the old phone to new phone, e.g. by using iTune backup for iPhones; using tools like Smart Switch for Samsung; is the ECID going to be unchanged and thus same UV is preserved.

Thanks,

John