We use this low melt solder paste for middle layer reballing on the iPhone X, Xs, and Xs Max. It’s a little stronger than the 138°C low melt solder, but doesn’t require as much heat to melt as the 183°C solder paste. It’s perfect for middle layer reballing. You really just need a dabble of this stuff on the end of your soldering tip to touch up any corroded pads. This stuff is perfect for that. You should also be able to use this on the iPhone 11, 11 Pro, and 11 Pro Max.
You’ll get 42g of solder paste.