In order to be able to track Galileo signals, the chipset needs to have been designed with that ability and on top of that, the manufacturer of the device (in your case, a smartphone) should have taken the necessary measures to enable it (either from factory or via a firmware update).
As of this date, we are aware of only two devices in the market that fulfil both conditions: the BQ Aquaris X5 (see the related news in our website https://www.gsa.europa.eu/newsroom/news ... ileo-ready
) and the Huawei Mate 9.
We invite you to contact the customer service of UMI Touch on how you can receive a software patch to activate Galileo on your Mediatek chip. We would appreciate to hear back from you if you receive a positive answer.