Lumia 900 - RM-808 Dead (Rethink Possible) - GSM-Forum

skynetto · 09-19-2013, 15:06

I have a Lumia 900, RM-808 by AT&T locked.
At power-on it presents the logo of AT&T (Rethink possible) and nothing more.

Tried to upgrade firmware with NOKIA NCS (firware upgrade success) but phone still hangs at logo and wont go on WindowsPhone.

Tried with ATF - Nitro (Havent tried TP, only with USB) and still hangs on Rethink Possible logo.

I'm not tryin to Unlock it (as I know it is not possible at the moment).
I'm just tryin to bring it to life.

Can I have any advice on what I'm doin' wrong?

Thanks and best regards,

-skynetto.

skynetto · 09-20-2013, 10:57

Any news? Is TP mode the only way to revive this phone?

skynetto · 09-23-2013, 18:19

Also tried TP mode. Loaded Qualcomm OSBL. Flashed new firmware. Still stucked at "Rethink possbile". Any clues? Please I need some help here.

BR
skynetto.

..::Thanh_gsm::.. · 09-25-2013, 04:31

Maybe try read full dump from alive phone then restore your phone. Not ok so maybe change emmc to try. I meet some case but customer not allow keep phone long time.

skynetto · 09-27-2013, 08:57

Sorry for the late reply.
As there were improvements in the ATF team regarding this phone (Unlocking it) I was hoping there will be a big boot file to revive it. Tried the unlock method and it gave me the unlock codes indeed so I don't think that something hardware is broken. Don't have any 900 here so I'm waiting for someone to release the full dump of the phone so i can try.
By now the phone is locked but I've extracted the unlock codes with the jtag method. Just waitng to see if some big boot files will be released.
Thanks a lot for your response anyway

skynetto · 11-09-2013, 19:07

@Angel
Let's try once again what I've done so far.
Phone arrived with problem stucked at "Rethink possible".
After some tests in usb mode and in TP mode I was able to destroy the partition table but with the help of X-Shadow was able to restore it again. He send to me the full 900 dump (16gb of data) and I've restored the partition table. Till then I'm unable to flash it again as it is saying always 0x03 error at AMSS certificate. Before des****** the partition table I was able to flash it (but always stucked at rethink possible) so I don't think it is a hardware issue.
X-Shadow asked me twice for my nitro serial number and if I had it JTag activated. I've respond to him twice but that was a dead end. No more response from him. Don't wanted to bother him again but if there is a way to revive this phone please let me know.
I have GPG cables with wich I'm able to see partitions in TP mode, I'm able to flash phone in TP mode but I'm unable to flash it in USB mode. As I've bought the JTAG activation I'm able to read the unlock codes from this phone so everything is working from hardware mode as far as I can tell.
Hope to hear any news from you.

Best regards
skynetto.

boygeohp1111 · 09-09-2015, 17:03

waiting for update still waiting mode on

09-19-2013, 15:06	#1 (permalink)
skynetto Insane Poster Join Date: Sep 2013 Posts: 67 Member: 2026244 Status: Offline Thanks Meter: 15	Lumia 900 - RM-808 Dead (Rethink Possible) I have a Lumia 900, RM-808 by AT&T locked. At power-on it presents the logo of AT&T (Rethink possible) and nothing more. Tried to upgrade firmware with NOKIA NCS (firware upgrade success) but phone still hangs at logo and wont go on WindowsPhone. Tried with ATF - Nitro (Havent tried TP, only with USB) and still hangs on Rethink Possible logo. I'm not tryin to Unlock it (as I know it is not possible at the moment). I'm just tryin to bring it to life. Can I have any advice on what I'm doin' wrong? Thanks and best regards, -skynetto.

09-20-2013, 10:57	#2 (permalink)
skynetto Insane Poster Join Date: Sep 2013 Posts: 67 Member: 2026244 Status: Offline Thanks Meter: 15	Any news? Is TP mode the only way to revive this phone?

09-23-2013, 18:19	#3 (permalink)
skynetto Insane Poster Join Date: Sep 2013 Posts: 67 Member: 2026244 Status: Offline Thanks Meter: 15	Also tried TP mode. Loaded Qualcomm OSBL. Flashed new firmware. Still stucked at "Rethink possbile". Any clues? Please I need some help here. BR skynetto.

09-25-2013, 04:31	#4 (permalink)
..::Thanh_gsm::.. No Life Poster Join Date: Dec 2005 Location: Ha Noi - Viet Nam Age: 18 Posts: 1,289 Member: 207400 Status: Offline Sonork: 100.1582556 Thanks Meter: 262	Maybe try read full dump from alive phone then restore your phone. Not ok so maybe change emmc to try. I meet some case but customer not allow keep phone long time.

09-27-2013, 08:57	#5 (permalink)
skynetto Insane Poster Join Date: Sep 2013 Posts: 67 Member: 2026244 Status: Offline Thanks Meter: 15	Sorry for the late reply. As there were improvements in the ATF team regarding this phone (Unlocking it) I was hoping there will be a big boot file to revive it. Tried the unlock method and it gave me the unlock codes indeed so I don't think that something hardware is broken. Don't have any 900 here so I'm waiting for someone to release the full dump of the phone so i can try. By now the phone is locked but I've extracted the unlock codes with the jtag method. Just waitng to see if some big boot files will be released. Thanks a lot for your response anyway

11-09-2013, 19:07	#6 (permalink)
skynetto Insane Poster Join Date: Sep 2013 Posts: 67 Member: 2026244 Status: Offline Thanks Meter: 15	@Angel Let's try once again what I've done so far. Phone arrived with problem stucked at "Rethink possible". After some tests in usb mode and in TP mode I was able to destroy the partition table but with the help of X-Shadow was able to restore it again. He send to me the full 900 dump (16gb of data) and I've restored the partition table. Till then I'm unable to flash it again as it is saying always 0x03 error at AMSS certificate. Before des****** the partition table I was able to flash it (but always stucked at rethink possible) so I don't think it is a hardware issue. X-Shadow asked me twice for my nitro serial number and if I had it JTag activated. I've respond to him twice but that was a dead end. No more response from him. Don't wanted to bother him again but if there is a way to revive this phone please let me know. I have GPG cables with wich I'm able to see partitions in TP mode, I'm able to flash phone in TP mode but I'm unable to flash it in USB mode. As I've bought the JTAG activation I'm able to read the unlock codes from this phone so everything is working from hardware mode as far as I can tell. Hope to hear any news from you. Best regards skynetto.

09-09-2015, 17:03	#7 (permalink)
boygeohp1111 Junior Member Join Date: May 2015 Posts: 12 Member: 2397461 Status: Offline Thanks Meter: 1	waiting for update still waiting mode on