lenovo a850 baseband unknown - GSM-Forum

acharyabhumi · 01-09-2017, 06:33

I got lenovo a850 (build no. a850_s203_www.sjrom.cn) with problem of hang sometime. then i flashed it with "lenovo A850_S203_new.rar" from needrom..com, now the handset doesn't show SIM cards.

it shows BASEBAND UNKNOWN. and IMEI No. INVALID.

i tried to write NVRAM. but i cannot find any.
(NVRAM collection of gsmhosting shows a850, but there is only one file, the other file is missing.)

if i flash any other firmware (Lenovo_A850_4.2_(by_xdafirmware,com) .zip) the handset doesn't boot.
now i cannot find the firmware with the same build no. as there was on the handset.

anyone plz help me.

acharyabhumi · 01-10-2017, 08:08

baseband solved by writing another firmware and IMEI by chamelephon.apk

chirhoandroid · 02-10-2017, 01:49

which firmware did you use? thanks

hasubhai · 02-19-2017, 19:47

Just reheat on main ic lightly and flash again, if base band come then write imei will be success
dont heat to much otherwise set will be dead

post result
good luck

zaynal82 · 02-23-2017, 08:15

format via sp flashtool after format full flash done write imei

kkphone · 12-17-2017, 08:38

Quote:

Originally Posted by acharyabhumi

baseband solved by writing another firmware and IMEI by chamelephon.apk

use this firmware, please for the boss link

Sent from my Redmi 4X using Tapatalk

01-09-2017, 06:33	#1 (permalink)
acharyabhumi Freak Poster Join Date: Oct 2009 Location: Nepal Posts: 149 Member: 1132141 Status: Offline Thanks Meter: 24	lenovo a850 baseband unknown I got lenovo a850 (build no. a850_s203_www.sjrom.cn) with problem of hang sometime. then i flashed it with "lenovo A850_S203_new.rar" from needrom..com, now the handset doesn't show SIM cards. it shows BASEBAND UNKNOWN. and IMEI No. INVALID. i tried to write NVRAM. but i cannot find any. (NVRAM collection of gsmhosting shows a850, but there is only one file, the other file is missing.) if i flash any other firmware (Lenovo_A850_4.2_(by_xdafirmware,com) .zip) the handset doesn't boot. now i cannot find the firmware with the same build no. as there was on the handset. anyone plz help me.

02-10-2017, 01:49	#3 (permalink)
chirhoandroid Junior Member Join Date: May 2015 Posts: 5 Member: 2389243 Status: Offline Thanks Meter: 1	which firmware which firmware did you use? thanks

01-10-2017, 08:08	#2 (permalink)
acharyabhumi Freak Poster Join Date: Oct 2009 Location: Nepal Posts: 149 Member: 1132141 Status: Offline Thanks Meter: 24	baseband solved by writing another firmware and IMEI by chamelephon.apk

02-19-2017, 19:47	#4 (permalink)
hasubhai Freak Poster Join Date: Jun 2010 Location: india Posts: 142 Member: 1334683 Status: Offline Sonork: hasubhai Thanks Meter: 144	Just reheat on main ic lightly and flash again, if base band come then write imei will be success dont heat to much otherwise set will be dead post result good luck

02-23-2017, 08:15	#5 (permalink)
zaynal82 Junior Member Join Date: Dec 2016 Posts: 11 Member: 2662792 Status: Offline Thanks Meter: 3	format via sp flashtool after format full flash done write imei