It does but you will not be able access SMS and MMS messages sent in your prior SMS app in Signal. This has prevented me and based upon multiple threads found w

It does but you will not be able access SMS and MMS messages sent in your prior SMS app in Signal. This has prevented me and based upon multiple threads found while trying to see if it was possible many others from switching to using Signal as my default SMS messenger. It used to be able to import your prior messages but lost the ability to do so and the developers don't seem particularly open to bringing it back.