I have bad reception also when I’m on a call I don’t have network

Hey Nas7860,

Thanks for using Apple Support Communities. It could be expected that you're not able to access the internet while on a phone call. We found the following: View or change cellular data settings on iPhone - Apple Support

5G, LTE, 4G, and 3G service on GSM cellular networks support simultaneous voice and data communications. For all other cellular connections, you can’t use internet services while you’re talking on the phone unless iPhone also has a Wi-Fi connection to the internet. Depending on your network connection, you may not be able to receive calls while iPhone transfers data over the cellular network—when downloading a webpage, for example.

* GSM networks: On an EDGE or GPRS connection, incoming calls may go directly to voicemail during data transfers. For incoming calls that you answer, data transfers are paused.

* CDMA networks: On EV-DO connections, data transfers are paused when you answer incoming calls. On 1xRTT connections, incoming calls may go directly to voicemail during data transfers. For incoming calls that you answer, data transfers are paused.

Data transfer resumes when you end the call.

We recommend reaching out to your carrier to see what's expected for your network. For your poor signal strength, let us know more to help:

• Do you notice this happening in certain locations or does it happen regardless of your location (indoors, outdoors, etc.)?
• Does this happen with all incoming and outgoing calls or with only certain contacts?
• Which exact software version shows in Settings > General > About?

The more details you can provide the better the community can help.

Take care