Good news, a year after its appearance on the first smartphones (¹), Apple finally integrates a GNSS receiver chipset compatible GALILEO. The iPhone 8/8+ and soon iPhone X are now equipped with the Snapdragon X16 LTE modem MDM9655 from Qualcomm, which includes a multi-GNSS receiver : GPS (USA), GLONASS (Russia), GALILEO (Europe) and QZSS (Japan) (²).
[Update 15/12/2017] The iPhone 6S and 7 are now compatible with Galileo signals.