cannot decode USSD with national alphabet

[basinilya]

Modem Huawei E3276
Cannot send USSD: +CME ERROR: 100
Cannot even decode a dump:

# +CUSD: 0,"0414043B044F00200441043F044004300432043A04380020043E002004310430043B0430043D044104350020043D04300431043504400438044204350020002A0031003000350023002E002004230441043B0443043304300020043104350441043F043B04300442043D0430002E",72
# 
./at-ussd-reply at-ussd/10-E3276.dump E160
 04 |14 |04 |3B;|04 |4FO                                         ...;.O

00 |E8 |03 |9B |00 |E8 |00 |3B;|00 |E8 |00 |4FO                 .......;...O

expected:

Для справки о балансе наберите *105#. Услуга бесплатна

Looks like all dcs values except '15' are ignored.

dump, gammu log, dump of USSD sent with Huawei MobilePartner:
http://basinilya.googlecode.com/svn/wiki/gammu/

decode with perl:

use Encode qw(from_to encode);
my $st
$st = "0414043B044F00200441043F044004300432043A04380020043E002004310430043B0430043D044104350020043D04300431043504400438044204350020002A0031003000350023002E002004230441043B0443043304300020043104350441043F043B04300442043D0430002E";
$st = pack("H*", $st);
encode("ucs-2",$st); # mark that bytestring is in ucs2
from_to($st,"ucs-2","utf-8"); # actually recode
print $st;