You've hit on a key point about cellular technology: it's not a single, monolithic signal, but a complex system using multiple frequency bands. Here's a breakdown to help you understand:
1. Frequency Bands and Cellular Technology:
* Frequency Bands:
* Cellular networks (like 4G and 5G) operate on specific ranges of radio frequencies, called frequency bands.
* These bands are like different "channels" for wireless communication.
* Different bands have different characteristics:
* Lower frequencies (e.g., 700 MHz) travel further and penetrate buildings better.
* Higher frequencies (e.g., mmWave 5G) offer much faster speeds but have shorter ranges and are more easily blocked by obstacles.
* Multiple Bands per "G":
* Both 4G and 5G utilize multiple frequency bands.
* A single 4G or 5G connection might actually be using several bands simultaneously (carrier aggregation) to boost speed and reliability.
* Therefore, when someone says "4G" or "5G," they're referring to the technology standard, not a single, fixed frequency.
2. Network Configuration Changes:
* Serving Site/Sector:
* Cellular networks are made up of many cell towers (serving sites) that cover specific areas (sectors).
* Each sector emits signals on various frequency bands.
* Configuration Alterations:
* Network operators constantly adjust the configuration of these cell towers to:
* Improve coverage.
* Increase capacity (handle more users).
* Optimize performance.
* Repair or replace equipment.
* These adjustments can involve:
* Changing the power levels of different frequency bands.
* Adding or removing frequency bands.
* Adjusting the direction of antennas.
* Software updates to the cell tower equipment.
* Impact on Coverage/Performance:
* As a result of these changes, the coverage footprint and performance of 4G and 5G in a specific area can change.
* For example, if a network operator reduces the power of a specific 4G band, users in that area might experience weaker 4G signals.
* This is why someone may experience a change in service, even if the general 4g or 5g service has not been removed.
3. Why Operators Don't Arbitrarily Disable Coverage:
* Network Optimization:
* Network operators invest heavily in their infrastructure and strive to provide the best possible service.
* They don't intentionally disable working coverage unless there's a strong technical or economic reason.
* Customer Satisfaction:
* Disabling coverage would lead to customer complaints and churn (customers switching to other providers).
* Technical Reasons for Changes:
* Changes are more likely due to things like:
* Upgrading equipment.
* Re-allocating frequency bands.
* Addressing interference issues.
* Optimizing the network for better overall performance.
In Summary:
The key takeaway is that cellular networks are dynamic and complex. Changes in coverage and performance are often the result of ongoing network optimization,
not the arbitrary removal of a "G" service.
