Hello -iBlaze-,
Welcome to Apple Support Communities!
If we understand your post correctly, your cellular service on your iPhone is intermittently dropping. We'd like to help!
To turn Cellular Data on or off, go to Settings 
> Cellular.
To set options when Cellular Data is on, go to Settings > Cellular > Cellular Data Options, then do any of the following:
- Reduce cellular usage: Turn on Low Data Mode, or tap Data Mode, then choose Low Data Mode. This mode pauses automatic updates and background tasks when iPhone isn’t connected to Wi-Fi.
- Turn Data Roaming on or off: Data Roaming permits internet access over a cellular data network when you’re in a region not covered by your carrier’s network. When you’re traveling, you can turn off Data Roaming to avoid roaming charges.
Depending on your iPhone model, carrier, and region, the following options may be available:
- Turn Voice Roaming on or off: (CDMA) Turn Voice Roaming off to avoid charges from using other carrier’s networks. When your carrier’s network isn’t available, iPhone won’t have cellular (data or voice) service.
- Enable or disable 4G/LTE: Using 4G or LTE loads internet data faster in some cases but may decrease battery performance. There may be options for turning off 4G/LTE or for selecting Voice & Data (VoLTE) or Data Only.
On iPhone 12 models and later, you can do the following:
- Enable Smart Data mode to optimize battery life: Tap Voice & Data, then choose 5G Auto. In this mode, your iPhone automatically switches to LTE when 5G speeds don’t provide noticeably better performance.
- Use higher-quality video and FaceTime HD on 5G networks: Tap Data Mode, then choose Allow More Data on 5G."
For more information about viewing or changing cellular options check out this article: View or change cellular data settings on iPhone
Let us know if you have any questions.
Thank you for using Apple Support Communities.
Take care!
