Slow 4G speeds.

mohammed98221mohammed98221 Level 2
edited November 2020 in ROG Phone 3

Please tell us some basic information before asking for help:

  1. Model Name: ZS661KS-1A001CN
  2. Firmware Version:WW_17.0823.2008.78
  3. Rooted or not: Not
  4. Frequency of Occurrence:
  5. APP Name & APP Version (If your issue relates to the app):

In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.


Hi all,

I been testing 4G speeds on this phone and so far I am disappointed with the results. I am getting around 4 or 5 Mbps download and around 3/4 Mbps upload. I used to get 50/60 Mbps on my Pixel 4 Xl. I am on Virgin Mobile network in the UK. I know that the phone has fewer frequency bands but this is quite dramatic difference in speed.

Can others with the Chinese version let me know if they have noticed any big differences in speeds with this phone.



  • A quick update: So I've speed tested my phone at several locations now and I'm happy to say that it is averaging a healthy 30/40 Mbps download. So I guess I will be keeping this phone. Now just have to wait for a fix for black crush...

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