It is important to understand that if you have left a large urban area, you may experience poor mobile reception due to the insufficient capacity of the towers, and unfortunately, you won't be able to fix this issue on your own.
Additionally, during power outages, when mobile network operators face overloads as people switch from Wi-Fi to mobile internet en masse, you will not be able to improve your signal quality independently, regrettably.
In basements or rooms with thick concrete walls, your smartphone may also struggle to catch a signal. To enhance the reception in such situations, you might need to consider purchasing a mobile signal booster.
If you notice that your network signal has degraded after purchasing a new phone case, try removing it and comparing the signal quality. A poorly designed case is often a culprit for diminished mobile reception.
However, there are several other factors that can negatively impact your signal, which you might be able to address.
The first step to try and improve your mobile signal quality is to toggle airplane mode on and off. This action prompts the phone to reconnect to the network and often resolves connectivity issues.
If the situation does not improve, you can attempt to restart your phone or manually connect to the mobile network in the settings.
Sometimes, the cause of poor reception may lie in the phone's hardware. Specifically, the communication antenna might be malfunctioning. In such cases, you will need to seek assistance from professionals at a service center.