A bit of history:
1. Got a Verizon Galaxy Note 4 relatively soon after it was launched, running Kit Kat.
2. Switched carriers from Verizon to T-Mobile. Everything worked fine.
3. Saw that Verizon rolled out Lollipop. Made a bad decision: briefly go back to Verizon, update to Lollipop, then go back to T-mobile in the course of one day.
4. With a T-mobile SIM card in, voice calls work fine but mobile data doesn't work.
(5. A few days later T-mobile rolls out Lollipop. Tough break.)
Now I'm trying to flash T-mobile's lollipop onto the phone. Step one, attempt to root using CVF-Auto-Root. (In more detail, trying to follow the steps at trueandroid[dotcom]/how-to-root-verizon-galaxy-note-4-sm-n910v-easy-guide/. Sorry, I can't post links.)
But the operation in Odin fails at the last step. These are the messages I get:
<ID:0/005> Get PIT for mapping..
<ID:0/005> Firmware update start..
<ID:0/005> recovery.img
<ID:0/005> NAND Write Start!!
<ID:0/005> cache.img.ext4
<ID:0/005> FAIL! (Auth)
<OSM> All threads completed. (succeed 0 / failed 1)
I'd be grateful for any help. Thanks.
---------
EDIT: I was able to roll back the OS to stock Verizon KitKat 4.4.4, even without rooting. I used instructions found on the xda dev forum. Thanks to everyone for their suggestions.
SECOND EDIT: After successfully rolling back to KitKat 4.4.4, I still had issues with mobile data. Only then did I remember a necessary step: I had to chain the Access Point Names (APNs) from VZW's to T-Mobile's. After doing that on 4.4.4, mobile data worked fine. Then I re-flashed Lollipop, again had mobile data issues, and then changed the APNs from VZW's to T-Mobile's, and presto: worked fine.
1. Got a Verizon Galaxy Note 4 relatively soon after it was launched, running Kit Kat.
2. Switched carriers from Verizon to T-Mobile. Everything worked fine.
3. Saw that Verizon rolled out Lollipop. Made a bad decision: briefly go back to Verizon, update to Lollipop, then go back to T-mobile in the course of one day.
4. With a T-mobile SIM card in, voice calls work fine but mobile data doesn't work.
(5. A few days later T-mobile rolls out Lollipop. Tough break.)
Now I'm trying to flash T-mobile's lollipop onto the phone. Step one, attempt to root using CVF-Auto-Root. (In more detail, trying to follow the steps at trueandroid[dotcom]/how-to-root-verizon-galaxy-note-4-sm-n910v-easy-guide/. Sorry, I can't post links.)
But the operation in Odin fails at the last step. These are the messages I get:
<ID:0/005> Get PIT for mapping..
<ID:0/005> Firmware update start..
<ID:0/005> recovery.img
<ID:0/005> NAND Write Start!!
<ID:0/005> cache.img.ext4
<ID:0/005> FAIL! (Auth)
<OSM> All threads completed. (succeed 0 / failed 1)
I'd be grateful for any help. Thanks.
---------
EDIT: I was able to roll back the OS to stock Verizon KitKat 4.4.4, even without rooting. I used instructions found on the xda dev forum. Thanks to everyone for their suggestions.
SECOND EDIT: After successfully rolling back to KitKat 4.4.4, I still had issues with mobile data. Only then did I remember a necessary step: I had to chain the Access Point Names (APNs) from VZW's to T-Mobile's. After doing that on 4.4.4, mobile data worked fine. Then I re-flashed Lollipop, again had mobile data issues, and then changed the APNs from VZW's to T-Mobile's, and presto: worked fine.
Last edited: