Galileo support for Xperia X

Well, the Chipset of the Xperia should support it (see https://www.usegalileo.eu/EN/inner.html#data=smartphone - choose chipsets look for Qualcomm Snapdragon 650), but Sony only states A-GNSS (GPS + GLONASS) and the same page from link before only lists Sony XZ, X2, XZ2, XZ1 as supported. On the other hand I can't think it to be impossible, as the chipset is supported and android HAL probably should support it chipset wise and not for specific devices, or am I wrong?

I would say :

• Galileo uses slightly different frequencies than both GPS and GLONASS. The Xperia X might be lacking the corresponding radio and antenna equipment and thus not be able to catch the signal, even if the navigation core of the Snapdragon would have been capable of decoding it.

• Some of the earlier GPS+GLONASS+Galileo cores (I have no idea if it applies to Snapdragon 650) can only either decode GPS+GLONASS or GPS+Galileo but not both at the same time. If that's the case, extra software is needed to switch between the two modes. (Exactly the same is reported to happen with the earliest core that started adding chinese Beidou in the mix).