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First, your issue is likely somewhere around the connection to your server not being handled correctly when it should time out. Now, to simulate poor network conditions on an iPhone or iPad, you need access to the Developer settings from the Settings menu, then select “Network Link Conditioner“ to access the tool. If you don't see the developer settings, you may not have tested using this device with Xcode yet, and if you don't have Xcode installed, you will need it, so go install Xcode connect your device, trust the computer and then go back and follow the steps above. You can select different kinds of connection (Edge, 3G, LTE/4G, Very Bad Network…) and add your own presets based on several values. In Bandwidth, Out Bandwidth and Latency should fit your needs. Tap “Enable“ to activate the preset. Google: xcode poor network signal issues wifi - will also provide you with a host of ways to perform the tests you may need in order to help recreate and solve the issue. Be sure to turn it off when you're done testing. Good luck!