[Android Q&A, Help & Troubleshooting] EndDroid:
Hello guys someone could help me carries a rom or is the stock rom for this phone model, because I have been a long time looking on the internet but never meeting, I tried porting roms for it but to no avail, then let the build.prop to you see the specifications of it.

# begin build properties

# autogenerated by buildinfo.sh

ro.build.id=JRO03C

ro.build.display.id=ALPS.JB.MP.V1.3_P4

ro.build.version.incremental=115

ro.custom.build.version=MEU_AN350_Brazil_V1.07

ro.tinno.build.version=S7503_PP_F2F3F5F8_B1B5_BR_BST_19_16_flasher_user

ro.build.version.sdk=16

ro.build.version.codename=REL

ro.build.version.release=4.1.1

ro.build.date=Fri May 31 18:53:54 CST 2013

ro.build.date.utc=1369997634

ro.build.type=user

ro.build.user=android

ro.build.host=HTSVR7

ro.build.tags=test-keys

ro.product.model=s7503

ro.product.brand=BRIGHTSTAR

ro.product.name=s7503

ro.product.device=s7503

ro.product.board=s7503

ro.product.cpu.abi=armeabi-v7a

ro.product.cpu.abi2=armeabi

ro.product.manufacturer=Enspert

ro.product.locale.language=pt

ro.product.locale.region=BR

ro.wifi.channels=

ro.board.platform=

# ro.build.product is obsolete; use ro.product.device

ro.build.product=s7503

# Do not try to parse ro.build.description or .fingerprint

ro.build.description=s7503-user 4.1.1 JRO03C 115 test-keys

ro.build.fingerprint=BRIGHTSTAR/s7503/s7503:4.1.1/JRO03C/:user/test-keys

ro.build.flavor=

ro.build.characteristics=default

# end build properties

# begin mediatek build properties

ro.mediatek.version.release=ALPS.JB.MP.V1.3_P4

ro.mediatek.platform=MT6575

ro.mediatek.chip_ver=S01

ro.mediatek.version.branch=ALPS.JB.MP

# end mediatek build properties

#

# system.prop for generic sdk

#

rild.libpath=/system/lib/mtk-ril.so

rild.libargs=-d /dev/ttyC0

# MTK, Infinity, 20090720 {

wifi.interface=wlan0

# MTK, Infinity, 20090720 }

# MTK, mtk03034, 20101210 {

ro.mediatek.wlan.wsc=1

# MTK, mtk03034 20101210}

# MTK, mtk03034, 20110318 {

ro.mediatek.wlan.p2p=1

# MTK, mtk03034 20110318}

# MTK, mtk03034, 20101213 {

mediatek.wlan.ctia=0

# MTK, mtk03034 20101213}

# MTK, TeChien {

ro.media.enc.hprof.file.format=3gp

ro.media.enc.hprof.codec.vid=m4v

ro.media.enc.hprof.vid.width=720

ro.media.enc.hprof.vid.height=480

ro.media.enc.hprof.vid.fps=30

ro.media.enc.hprof.codec.aud=amrnb

ro.media.enc.hprof.aud.bps=12200

ro.media.enc.hprof.aud.ch=1

ro.media.enc.hprof.aud.hz=8000

ro.media.enc.mprof.file.format=3gp

ro.media.enc.mprof.codec.vid=m4v

ro.media.enc.mprof.vid.width=352

ro.media.enc.mprof.vid.height=288

ro.media.enc.mprof.vid.fps=30

ro.media.enc.mprof.vid.bps=990000

ro.media.enc.mprof.codec.aud=amrnb

ro.media.enc.mprof.aud.bps=12200

ro.media.enc.mprof.aud.ch=1

ro.media.enc.mprof.aud.hz=8000

ro.media.enc.lprof.file.format=3gp

ro.media.enc.lprof.codec.vid=h263

ro.media.enc.lprof.vid.width=176

ro.media.enc.lprof.vid.height=144

ro.media.enc.lprof.vid.fps=30

ro.media.enc.lprof.vid.bps=384000

ro.media.enc.lprof.codec.aud=amrnb

ro.media.enc.lprof.aud.bps=12200

ro.media.enc.lprof.aud.ch=1

ro.media.enc.lprof.aud.hz=8000

# MTK, TeChien }

#

wifi.tethering.interface=ap0

#

ro.opengles.version=131072

wifi.direct.interface=p2p0

dalvik.vm.heapgrowthlimit=64m

dalvik.vm.heapsize=128m

# Encrypt phone function

ro.crypto.tmpfs_options=mode=0771,uid=1000,gid=1000

ro.crypto.fs_type=ext4

ro.crypto.fs_real_blkdev=/emmc@usrdata

ro.crypto.fs_mnt_point=/data

ro.crypto.fs_options=noauto_da_alloc

ro.crypto.fs_flags=0x00000406

ro.com.google.clientidbase=android-enspert

# audio

ro.camera.sound.forced=0

ro.audio.silent=0

# USB Config Type

ro.sys.usb.storage.type=mtp,mass_storage

# USB MTP WHQL

ro.sys.usb.mtp.whql.enable=0

# Power off opt in IPO

sys.ipo.pwrdncap=2

ro.sys.usb.storage.type=mtp,mass_storage

# USB BICR function

ro.sys.usb.bicr=yes

#bt name.

net.tinno.bt.name = MEU AN350

#

# ADDITIONAL_BUILD_PROPERTIES

#

gps.solution.combo.chip=1

fmradio.driver.chip=3

ro.sf.hwrotation=0

ril.current.share_modem=2

launcherplus.allappsgrid=2d

launcher2.allappsgrid=3d_20

curlockscreen=2

ro.mediatek.gemini_support=true

persist.radio.fd.counter=20

persist.radio.fd.off.counter=20

drm.service.enabled=true

fmradio.driver.enable=1

dalvik.vm.mtk-stack-trace-file=/data/anr/mtk_traces.txt

mediatek.wlan.chip=MT6628

mediatek.wlan.module.postfix=_mt6628

ro.operator.optr=CUST

persist.sys.timezone=America/Sao_Paulo

ro.setupwizard.mode=OPTIONAL

ro.com.google.gmsversion=4.1_r5

ro.config.ringtone=MEUBRASIL.ogg

ro.config.ringtone_sim2=MEUCLASSICO.ogg

ro.config.notification_sound=NOTIFICACAO_2.ogg

ro.config.alarm_alert=NOTIFICACAO_2.ogg

net.bt.name=Android

dalvik.vm.stack-trace-file=/data/anr/traces.txt

## GPU Tuned by Android BAM Tweaker ##

debug.composition.type=c2d

debug.performance.tuning=1

persist.sys.composition.type=c2d

## Max events per second increased by Android BAM Tweaker ##

windowsmgr.max_events_per_sec=170

## Touch tuned by Android BAM Tweaker ##

touch.presure.scale=0.001

## Scrolling speed tweak enabled by Android BAM Tweaker ##

ro.max.fling_velocity=12000

ro.min.fling_velocity=8000

## Wifi scan interval Increased by Android BAM Tweaker ##

wifi.supplicant_scan_interval=180

## Photo and Video recording quality Increased by Android BAM Tweaker ##

ro.media.dec.jpeg.memcap=8000000

ro.media.enc.hprof.vid.bps=8000000