Because this rom based on XPERIA S rom. You can see it in build.prop
Really!
PHP:
##### Merging of the /util/data/semc_kernel_time_stamp.prop file #####
ro.build.date=Fri Oct 5 01:14:38 2012
ro.build.date.utc=1349367278
ro.build.user=BuildUser
ro.build.host=BuildHost
##### Final patch of properties #####
ro.build.product=LT26w
ro.build.description=LT26w-user 4.0.4 6.1.A.2.55 yPd_zw test-keys
ro.product.brand=SEMC
ro.product.name=LT26w_1266-3278
ro.product.device=LT26w
ro.build.tags=release-keys
ro.build.fingerprint=SEMC/LT26w_1266-3278/LT26w:4.0.4/6.1.A.2.55/yPd_zw:user/release-keys
######################## Customized property values #########################
ro.semc.version.cust=1266-3278
ro.semc.version.cust_revision=R4G
persist.ro.ril.sms_sync_sending=1
#########################################################################
ro.config.ringtone=xperia.ogg
ro.config.notification_sound=notification.ogg
ro.config.alarm_alert=alarm.ogg
ro.semc.content.number=PA4
################# Updating of the SW Version #################
ro.semc.version.fs_revision=6.1.A.2.55
ro.build.id=6.1.A.2.55
ro.build.display.id=XTXperience_8
##### Values from product package metadata #####
ro.semc.product.model=LT26w
ro.semc.ms_type_id=PM-0210-BV
ro.semc.version.fs=WORLD
ro.semc.product.name=Xperia acro S
ro.semc.product.device=LT26w
ro.product.model=LT26w
# begin build properties
# autogenerated by buildinfo.sh
ro.build.version.incremental=yPd_zw
ro.build.version.sdk=15
ro.build.version.codename=REL
ro.build.version.release=4.0.4
ro.build.type=user
ro.product.board=MSM8660_SURF
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=Sony Ericsson
ro.product.locale.language=en
ro.product.locale.region=US
ro.wifi.channels=
ro.board.platform=msm8660
# ro.build.product is obsolete; use ro.product.device
# Do not try to parse ro.build.description or .fingerprint
ro.build.characteristics=nosdcard
# end build properties
#
# system.prop for surf
#
# Notify the system that the RIL only signals once
ro.telephony.call_ring.multiple=false
rild.libpath=/system/lib/libril-qc-qmi-1.so
rild.libargs=-d /dev/smd0
persist.rild.nitz_plmn=
persist.rild.nitz_long_ons_0=
persist.rild.nitz_long_ons_1=
persist.rild.nitz_long_ons_2=
persist.rild.nitz_long_ons_3=
persist.rild.nitz_short_ons_0=
persist.rild.nitz_short_ons_1=
persist.rild.nitz_short_ons_2=
persist.rild.nitz_short_ons_3=
DEVICE_PROVISIONED=1
debug.sf.hw=1
debug.composition.type=dyn
ro.sf.compbypass.enable=1
wifi.interface=wlan0
wifi.supplicant_scan_interval=15
#
# system props for the cne module
#
persist.cne.UseCne=false
persist.cne.bat.range.low.med=30
persist.cne.bat.range.med.high=60
persist.cne.loc.policy.op=/system/etc/OperatorPolicy.xml
persist.cne.loc.policy.user=/system/etc/UserPolicy.xml
persist.cne.bwbased.rat.sel=false
persist.cne.snsr.based.rat.mgt=false
persist.cne.bat.based.rat.mgt=false
persist.cne.be.ge.sqi.min=0
persist.cne.be.ge.sqi.max=100
persist.cne.be.umts.sqi.min=0
persist.cne.be.umts.sqi.max=100
persist.cne.be.hspa.sqi.min=0
persist.cne.be.hspa.sqi.max=100
persist.cne.be.1x.sqi.min=0
persist.cne.be.1x.sqi.max=100
persist.cne.be.do.sqi.min=0
persist.cne.be.do.sqi.max=100
persist.cne.be.wlan.sqi.min=0
persist.cne.be.wlan.sqi.max=100
ro.hdmi.enable=true
lpa.decode=false
#system props for the MM modules
media.stagefright.enable-player=true
media.stagefright.enable-http=true
#
# system props for the data modules
#
ro.use_data_netmgrd=true
persist.data_netmgrd_nint=3
#system props for time-services
persist.timed.enable=true
# System props for audio
persist.audio.fluence.mode=endfire
persist.audio.vr.enable=false
persist.audio.hp=true
# System prop to select audio resampler quality
af.resampler.quality=255
persist.af.resampler.quality=255
# System props for SOLS
ro.semc.sols.product-code=103
ro.semc.sols.company-code=5
#
# system prop for opengles version
#
# 131072 is decimal for 0x20000 to report version 2
ro.opengles.version=131072
# NFC
ro.nfc.on.default=false
ro.nfc.se.sim.enable=false
ro.nfc.se.smx.enable=false
ro.nfc.icon.enable=true
ro.nfc.vendor.name=nxp
# prop to indicate what kind of external memory the product have.
ro.semc.product.user_storage=emmc_sdcard
ro.build.characteristics=default
# hwui
ro.hwui.text_cache_width=2048
#Default values/Locales for the hiding languages feature
ro.product.locale.excluded=ar_EG ar_IL fa_IR iw_IL
# Properties controlling Qcom performance patches
net.webkit.setpri=1
net.webkit.cache.mindeadsize=4194304
net.webkit.cache.maxdeadsize=4194304
net.webkit.cache.size=12582912
net.dns.cache_size=512
net.dns.cache_ttl=600
net.early.sockets=0
stathub.pp.prfth=30
net.tcp.fin.aggregation=1
net.dnshostprio.enable=1
net.http.threads=10
net.http.idle_cache.size=40
net.http.idle_cache.shutdown=true
net.nw.cache.prioadvstep=86400000
net.nw.cache.weightadvstep=3600000
net.nw.cache.orderby=weight
stathub.enabled=0
#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.product-res-path=framework/SemcGenericUxpRes.apk
ro.com.android.dataroaming=false
keyguard.no_require_sim=true
ro.com.android.dateformat=MM-dd-yyyy
ro.vendor.extension_library=/system/lib/libqc-opt.so
dalvik.vm.heapstartsize=8m
dalvik.vm.heapgrowthlimit=64m
dalvik.vm.heapsize=256m
ro.setupwizard.mode=DISABLED
ro.com.google.gmsversion=4.0_r7
ro.com.google.clientidbase=android-sonyericsson
ro.sf.lcd_density=320
ro.ril.hsxpa=1
ro.ril.gprsclass=10
ro.semc.xloud.supported=true
ro.usb.pid_suffix=176
dalvik.vm.dexopt-flags=m=y
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt
ro.service.swiqi2.supported=true
persist.service.swiqi2.enable=1
ro.drm.active.num=4
ro.drm.active.0=marlin,1
ro.drm.active.1=playready,1
ro.drm.active.2=dtla,1
ro.drm.active.3=marlin_import,1
# XTXperience Tweaks
dalvik.vm.verify-bytecode=false
dalvik.vm.dexopt-flags=v=n,o=v,m=y
windowsmgr.max_events_per_sec=240
ro.kernel.android.checkjni=0
ro.kernel.checkjni=0
ro.max.fling_velocity=12000
ro.min.fling_velocity=8000
persist.sys.ui.hw=1
ro.ril.disable.power.collapse=1
View.scroll_friction=10
# Sony Clear Audio+
ro.semc.sound_effects_enabled=true
ro.semc.xloud.supported=true
persist.service.xloud.enable=1
ro.semc.enhance.supported=true
persist.service.enhance.enable=1
ro.semc.clearaudio.supported=true
persist.service.clearaudio.enable=1
ro.sony.walkman.logger=1
persist.service.walkman.enable=1
ro.somc.clearphase.supported=true
persist.service.clearphase.enable=1
# System prop to select MPQAudioPlayer by default on mpq8064
mpq.audio.decode=true
Where do you see something about Xperia S in this???