I can't set a ringtone for my second SIM card

The feature to set a ringtone for your second SIM card was available for dual SIM Xperia devices running Android 5.0 (5.1), or earlier. The feature was not available for Xperia devices running Android 6.0 to 7.1.1. This was due to a limitation on the platform level from our platform supplier.

The following Dual SIM devices reintroduce dual ringtones:

• Xperia XZ3
• Xperia XZ2
• Xperia XZ2 Compact
• Xperia XZ2 Premium
• Xperia XA2
• Xperia XA2 Ultra
• Xperia XA2 Plus

Also, all Dual SIM devices running Android 9.0 Pie have this feature, such as Xperia XZ Premium, Xperia XZ1 and Xperia XZ1 Compact.