Nubia Z7 mini (NX507J): Adding LTE bands topic

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For the beginnings of this thread read posts 838-844 here.


Quote:









Originally Posted by alain57
(Post 59998584)

I did the modification on cucuo92 rom
i went back to CM12.1 and noticed that TWRP restaure an NV partition... So i first told TWRP to NOT restaure this partition => phone did not boot

So i had no choice and restaured this partition after all

well I went to a town where there is ONLY LTE 800Mhz, and like I expected did not work :/
So I guess that the NV partition backup in TWRP contains the NV changes :/

Nevertheless, i'll retry this with Cucuo92 rom to be sure that this mod is working on my phone
if it is, i will create a NV backup and try to compare it with the backup I already have (cucuo rom without changes)
and then I'll try to do the exact same difference on the CM12.1 NV backup... maybe this could work

you need to use another tool to do the LTE mod, the window you are showing is the one for UMTS (3G) modification
this window need to stay open, but the LTE mod are done in one other tool

So I was reading a little deeper in the thread and a few interesting things came out to me.
  1. CM is known (as of last September) to have added a commit to their code to prevent these changes (my guess is because of their rapid growth and wanting to play with the big manufacturers), so CM12 or CM12.1 may not successfully do this.

  2. It seems that this only works with custom ROM's/kernels that have been compiled from source (meaning Cuoco's ROM is built off of Nubia and they likely are preventing it in the kernel)

  3. It seems the phone has the correct modem to make this happen, but we may also need a custom radio compiled to enable these bands to work - although it seems some people in the other thread have had issues with this. Some say it works and others not so much.

  4. There's more but I don't have time at the moment. I'll try and add more later.


xda-developers


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