1. Anders789's Avatar
    So I ordered a Lenovo Vibe Z2 Pro on China Mobile and I've had for about 5 months now and I've fixed all the problems it had (there were little to none) like setting up the APN settings. But one thing I've never been able to fix is the 4G.... I've messed with the APN settings countless hours and nothing. My signal bars always have "3G" next to them. I'm not worried about LTE. I just want 4G at least. I've never had anything higher than 3G on this phone. Even with my old LG G3 I got 4G LTE everywhere in the city I live in. Even my house. I've never gotten at least 4G in any of the places that my G3 got it. I do understand that China Mobile operates on different LTE frequencies but shouldn't 4G at least work? Not even LTE, just 4G. Can someone clear the fog for me? All answers are appreciated!!!!! BTW I live in the United States. Not China. I'm on AT&T also.
    Attached Thumbnails No 4G on Lenovo Vibe Z2 Pro China Mobile?-1437671726433.jpg  
    07-23-2015 12:15 PM
  2. B. Diddy's Avatar
    That phone's compatible LTE bands don't overlap with AT&T's. AT&T uses bands 2, 4, 5, 17, 29, and 30, all of which are not compatible with your phone's LTE radio.

    Lenovo Vibe Z2 Pro specs

    The HSPA+ should work, though. Is there a setting in Settings>Mobile Networks>Preferred Network Type where you can select 3G vs 4G?
    07-23-2015 04:22 PM
  3. Anders789's Avatar
    Yes there is but I already have "4G preferred" selected
    07-24-2015 01:22 PM
  4. B. Diddy's Avatar
    Did you follow these steps to make sure the APN settings are correct? Programming non-AT&T devices with the correct APN and MMS data settings- AT&T Wireless Support
    07-24-2015 10:25 PM
  5. Anders789's Avatar
    Yes I'm pretty sure I entered then in correctly. I'll post a screenshot of what I have entered in.
    07-25-2015 11:38 AM
  6. Anders789's Avatar
    Here are my current APN settings.
    Attached Thumbnails No 4G on Lenovo Vibe Z2 Pro China Mobile?-1437842396015.jpg   No 4G on Lenovo Vibe Z2 Pro China Mobile?-1437842411279.jpg   No 4G on Lenovo Vibe Z2 Pro China Mobile?-1437842424757.jpg  
    07-25-2015 11:40 AM
  7. B. Diddy's Avatar
    The only discrepancy I see is Authentication Type should be "None," not "Not Set." Not sure if that matters, but it's worth changing. Also, Data Bearer isn't mentioned on the AT&T website, but Bearer is supposed to be Unspecified (as you already have it), so change Data Bearer to Unspecified as well.
    07-25-2015 04:47 PM
  8. Anders789's Avatar
    Data bearber or bearer?
    07-26-2015 06:22 PM
  9. B. Diddy's Avatar
    07-27-2015 01:34 AM
  10. Anders789's Avatar
    Ok I'll try both and I'll post my results
    07-27-2015 04:36 PM
  11. Anders789's Avatar
    I changed both and no luck. Does the preferred networks setting have anything to do with it?
    Attached Thumbnails No 4G on Lenovo Vibe Z2 Pro China Mobile?-1438033173702.jpg  
    07-27-2015 04:40 PM
  12. B. Diddy's Avatar
    I'm not sure--what comes up when you select that menu?

    Real stupid question here, but you are turning the Data Connection switch on, right? I assume you just have it off while you're modifying settings.
    07-27-2015 04:57 PM
  13. Anders789's Avatar
    Yes I did turn it on. No worries there. And this comes up when I select it.
    Attached Thumbnails No 4G on Lenovo Vibe Z2 Pro China Mobile?-1438195760340.jpg  
    07-29-2015 01:49 PM
  14. B. Diddy's Avatar
    Sorry, but I'm pretty much stumped. The last thing I'd suggest is to see what your actual download speeds are when the phone says you're on 3G. If they're 10-15 Mbps, then you're on HSPA+ and not the regular 3G, and perhaps the phone doesn't know that it should be displaying "4G" or "H+".
    08-03-2015 01:21 PM
  15. Anders789's Avatar
    Well thank you for your help. I really appreciate it!
    B. Diddy likes this.
    08-09-2015 01:46 PM

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