According to the web search results, the 4G network will not be phased out anytime soon, as it will co-exist with the 5G network for at least another decade. Some of the reasons for this are:

- 4G LTE is a stable and widely available technology that can support many IoT applications and devices at a lower cost than 5G.
- 5G is still in its early stages of deployment and adoption, and it faces some challenges such as limited coverage, high spectrum costs, and device compatibility issues.
- 4G LTE is constantly evolving and improving with new releases and features that can enhance its performance and capabilities.

Therefore, you do not need to worry about your 4G devices becoming obsolete in the near future. However, if you want to take advantage of the benefits of 5G, such as higher speed, lower latency, and lower power consumption, you may need to upgrade your devices and network plans accordingly. You can learn more about the differences between 4G and 5G from [this article](^1^) or [this video](^4^).

Source: Conversation with Bing, 9/24/2023

we follow eu or UK before turn off 2G GSM

2G is used for USSD code
Backup network during disaster like east coast states big flood years back. Many telco tower down. TNB shutdown.

512158 is 2G MOCN nationwide