Hey Sahota1,
Welcome to Apple Support Communities. We understand that you're having some issues with your iPhone after updating. We'd like to help.
We'd like to break up the issue you're having so we can be sure to cover all of them. Let's start with your Wi-Fi and Bluetooth connection issues. Do you notice if this happens when connected to one specific Wi-Fi network? If you've connected to others, and no issues appear, it could be something directly related to the network you're on.
What happens when you notice that your Wi-Fi connection stops? Do you see any error messages or alerts? If so, what do they say? How about Bluetooth? Do you notice that it's happening with more than one Bluetooth device?
Let's start off by looking to see if there is some Wi-Fi and Bluetooth issue caused by wireless interference:
Symptoms of wireless interference
Any of these symptoms could be caused by interference affecting the Wi-Fi or Bluetooth signal:
* Device doesn't connect or stay connected
* Connection is slow and signal strength
is low
* Bluetooth audio skips, stutters, cuts off, or has static or buzzing
* Pointer movement is erratic or jumpy
How to reduce wireless interference
These general steps can help achieve a cleaner, stronger wireless signal:
* Bring your Wi-Fi device closer to your Wi-Fi router. Bring the Bluetooth devices that are connecting to each other closer together.
* Avoid using your wireless devices near common sources of interference, such as power cables, microwave ovens, fluorescent lights, wireless video cameras, and cordless phones.
* Reduce the number of active devices that use the same wireless frequency band. Both Bluetooth and Wi-Fi devices use the 2.4 GHz band, but many Wi-Fi devices can use the 5 GHz band instead. If your Wi-Fi router supports both bands, it might help to connect more of your Wi-Fi devices to the 5GHz band. Some dual-band routers manage this for you automatically.
* Configure your Wi-Fi router to use a different Wi-Fi channel, or have it scan for the channel with the least interference. Most routers perform this scan automatically on startup or when reset.
Avoid physical obstructions in the path of your wireless signal. For example, a metal surface between your Bluetooth mouse and computer could cause the mouse to perform poorly, and a metal-reinforced concrete floor between your Wi-Fi router and Wi-Fi device could cause poor Wi-Fi performance.
* Low interference potential: wood, glass, and many synthetic materials
* Medium interference potential: water, bricks, marble
* High interference potential: plaster, concrete, bulletproof glass
* Very high interference potential: metal
Let us know the answers to the questions above and if you can rule out this interference as a cause of the issue and we'll go from there.
Cheers!