Q: iOS 9.2.3 wifi problems. PLEASE FIX ASAP
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Jun 1, 2016 10:46 PMby Ingo2711,Did you already make sure that your router settings are optimized?
Recommended settings for Wi-Fi routers and access points - Apple Support
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Jun 3, 2016 12:20 AMby Ingo2711,To make sure that this is not software related, set it back to factory settings, without using the latest backup at first. Set up your personal settings manually, don't install any 3rd party apps at this point.
Test the Wi-fi. If you are getting a stronger signal, use the latest backup to restore from. In case the problem comes back, some data inside the backups causing this
If the issue still exists after setting it back to factory settings, the problem might be hardware related and the phone has to be checked by Apple or an Apple Authorized Service Provider next to your place.
Service Answer Center - iPhone
Find an Apple Authorized Service Provider
Make an Apple Store appointment
Follow the steps in this article:
Use iTunes to restore your iOS device to factory settings - Apple Support
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Jun 3, 2016 8:12 AMby elcpu,Below is a User Tip about Wi-Fi issues. I know you have tried several of them but the others could help. Good luck.
1) Perform a Forced Restart: Hold down the Home and Wake/Sleep buttons at the same time for about 15-20 seconds until the Apple logo appears. Allow device to restart.
2) Reset Network Settings: Settings > General > Reset > Reset Network Settings. Rejoin the Network again.
3) Reboot Router/Modem: Unplug from power for 2 minutes and plug again. Update Router Firmware (check manufacturer’s support website for a newer FW). Also try different bands (2.4 GHz and 5 GHz) and different bandwidths (20 MHz recommended for the 2.4 band).
4) Change to Google's DNS: Settings > Wi-Fi > Click on the Network, Delete all numbers under DNS and enter 8.8.8.8 or alternatively 8.8.4.4
5) Disable device prioritization on the router if this feature is available. Also disable any VPN apps and test Wi-Fi again.
6) Determine if other Wi-Fi devices on network are working well (other iOS devices, Macs, PCs).
7) Try device at another Network, i.e., neighbors’, public coffee house, etc.
8) Backup and Restore the Device using iTunes (ask for additional for details if desired).
https://support.apple.com/en-us/HT201252
9) Go to an Apple Store for hardware evaluation.
