iPhone 12 and iPhone 12 Pro will be launching on Friday, 23rd October 2020 while iPhone 12 Mini and iPhone 12 Pro Max will be launching on Friday, 13th November 2020.
With regards to 5G/LTE networks in Singapore, we are getting the following models:

The Samsung Galaxy Note10 and Note10+ will be launching in Singapore on Saturday, 24th August 2019.
For the first time, there is an additional Note model available, which is the plus model, Note10+.
The iPhone XR will be launching on Friday, 26th October 2018.
With regards to LTE networks in Singapore, for the iPhone XR model, we are getting the A2105.
The Pixel 3 and Pixel 3 XL will be launching on Thursday, 1st November 2018.
The Pixel 3/3 XL will be available in three colors, Clearly White (White), Just Black (Black), and Not Pink (Pink). For each color and model, it is available in either 64GB or 128GB.
The iPhone XS and iPhone XS Max will be launching on Friday, 21st September 2018 while the cheaper iPhone XR will be launching end of next month on Friday, 26th October 2018.
With regards to LTE networks in Singapore, for the iPhone XS model we are getting the A2097 and for the iPhone XS Max model, we are getting the A2101.
The Samsung Galaxy Note 9 will be launching in Singapore on Saturday, 25th August 2018.
Three colors will be available at launch, Ocean Blue, Metallic Copper, and Midnight Black.