Simulate poor network on iOS Device/Simulator
use
Network Link Conditioner
Simulator
Network Link Conditioner
can be installed from
Additional Tools for Xcode
https://developer.apple.com/download/more/
device
Settings -> Developer -> Network Link Conditioner
If you don't see
Developer
menu on settings, try connecting to Xcode.
ref
https://medium.com/macoclock/how-to-simulate-poor-network-conditions-on-ios-simulator-and-iphone-faf35f0da1b5