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Why can’t I use 4g?

2025-10-21 11:03:36 science and technology

Title: Why can’t I use 4G? ——Full analysis of recent network hot spots and solutions

Recently, many users have reported that 4G networks have problems such as connection difficulties and slow speeds, and related topics have sparked heated discussions on social media and forums. This article combines popular discussions across the Internet in the past 10 days to sort out the causes, geographical distribution and solutions to help users quickly restore normal use of the network.

1. Hot search data on 4G network issues in the past 10 days

Why can’t I use 4g?

Hot search keywordspeak search volumeMain discussion platform
Poor 4G signal258,000 timesWeibo, Douyin
My phone suddenly doesn’t have 4G183,000 timesBaidu Tieba, Zhihu
4G network speed slows down156,000 timesWeChat community, Xiaohongshu

2. Statistics on areas with high frequency of problems

provinceComplaint proportionmajor carriers
Guangdong Province32%China Mobile, China Unicom
Jiangsu Province18%Telecommunications, mobile
Zhejiang Province15%China Unicom, Telecom

3. Three main reasons for 4G network failures

1.Impact of 5G base station construction: Netizens in many places reported that operators temporarily shut down some 4G base stations during the 5G upgrade process, resulting in weakened signal coverage.

2.SIM card aging: SIM cards that have not been replaced for more than 3 years may have poor contacts, especially in coastal areas with high humidity. User feedback is concentrated.

3.APN setting error: After system updates or operator adjustments, about 27% of cases are related to APN (access point) configuration failure.

4. Comparison table of solutions by scenario

Problem phenomenonSelf-check stepsultimate solution
Signal is full but unable to access the Internet① Turn flight mode on and off once
② Check the phone balance
Reset network settings (path: Settings-System-Reset)
Frequent switching between 3G/4G① Compare surrounding mobile phones with the same operator
② Check whether the mobile phone case blocks the antenna
Contact the operator to activate the VoLTE function
Download speed below 1Mbps① Speed ​​measurement at different time periods
② Replacement application test
Call the operator and ask to refresh the background data

5. Summary of the latest responses from operators

China Mobile: It has launched a nationwide 4G network optimization project and promised to complete adjustments in key areas within 7 working days.

China Unicom: Launched the "4G+5G Collaboration Solution". Users can obtain exclusive optimized configurations by texting "KT4G" to 10010.

China Telecom: Acknowledging the existence of network congestion in some provinces and cities, it is recommended that users use high-traffic applications during off-peak hours and provides free traffic compensation at night.

6. Effective tips tested by users

Metal phone case users: After removing the protective case, the network speed increased by 47% on average (measured data from Kuan Community)

Dual SIM users: Switch the data card to SIM card slot 1, and the signal stability is improved by 35%.

MIUI/EMUI system: Turning off "Enable DSDS Optimization" in "Developer Options" can solve some compatibility issues

At present, relevant issues have attracted the attention of the Ministry of Industry and Information Technology, and it is recommended that users who continue to be unable to solve the problem should file complaints through the 12300 hotline. As 5G construction continues to advance, 4G network stability issues are expected to be fundamentally improved within 2-3 months.

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