3GS NVRAM problem

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i'm trying friend bricked iphone 3gs. no clue did here's symptom:
- phone seems locked in dfu mode
- itunes brings error 21 while trying restore
- irecovery can connect, 'bgcolor' command works
- irecovery 'setenv' brings error 'nvram_save: no oldest bank saved, cannot continue'

i'm kind of stuck, phone :(

tried bring phone life?
 

is case helps, here's output of irecovery:

code:
irecovery - recovery utility 0x1281 , wtf.  westbaer-- , tom3q    got usb  error -9 when setting configuration  [nand] found chip id ec d7 d5 29 38 41 on fmi0:ce0  [nand] found chip id ec d7 d5 29 38 41 on fmi0:ce1  [nand] found chip id ec d7 d5 29 38 41 on fmi1:ce8  [nand] found chip id ec d7 d5 29 38 41 on fmi1:ce9      =======================================  ::  :: ibss n88ap, copyright 2010, apple inc.  ::  ::	build_tag: iboot-1072.61  ::  ::	build_style: release  ::  ::	usb_serial_number: cpid:8920 cprv:14 cpfm:03 scep:04 bdid:00 ecid:000003dxxxxc2d0d ibfl:00  ::  ======================================    entering recovery mode, starting command prompt  nvram_save: no oldest bank saved, cannot continue  (recovery) iphone$
is hardware issue or might solved via sw?
 


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