Q: I recently updated my iPhone but cancelled the update half way through and now it wont update and I have no signal as it just says Searching all the time

Hello there, akaJoey.

It sounds like you're currently unable to restore your iPhone after cancelling an update to the most recent iOS 9.3.1. The following Knowledge Base article offers a great solution for restoring:

If you can‘t update or restore your iPhone, iPad, or iPod touch

Put your device in recovery mode and set it up again

1. Connect your device to your computer and open iTunes. If you don't have a computer, borrow one from a friend or go to an Apple Retail Store or Apple Authorized Service Provider for help.
2. While your device is connected, force restart it: Press and hold both the Sleep/Wake and Home button for at least 10 seconds, and don't release when you see the Apple logo. Keep holding until you see the recovery mode screen.
   
3. When you see the option to Restore or Update, choose Update. iTunes will try to reinstall iOS without erasing your data. Wait while iTunes downloads the software for your device.
   If the download takes more than 15 minutes and your device exits recovery mode, you'll need to repeat these steps and choose Restore instead of Update when you get back to this step.
   
4. After the Update or Restore completes, set up your device. If you previously backed up your device with iTunes or iCloud and had to restore your device in step 3, you might be able to restore from your backup during setup.

Get more help

Contact Apple Support if you can’t update or restore your device with recovery mode, or you can't use recovery mode because of broken or stuck buttons.

Thanks for being a part of Apple Support Communities.

Cheers.