Here are the links and Models to choose from. Some of the features on iPhone that not working because restrictions are enabled. Apple, do you have any feedback to give us on this. I may have to try the low battery setting to make it through the work day.
You also need a tool that will guarantee there will be no damage and no data loss to the device.You need a powerful and easy-to-use tool to help you restore iPhone firmware and get your iPhone work normally again. Another option is to use Recovery Mode or DFU restore to complete the downgrade process. Then follow the on-screen guide to connect your device to computer and put it in recovery mode. Connect the device to computer and click Start. Launch iTunes and select the iOS device from the top left corner. ITunes recognizes the phone, and goes through the steps as if it were syncing, but nothing appears on my phone. Just select your iPhone model and click on it.
Even some website offering to check the icloud lock status but all of them are fake just seeking money.ITunes will start updating your iPhone or iPad. I think the issue is really more with the battery indicator not working properly. So iPhones normally gets ios update every month to update with recent security patches.