Smartphone Feiteng

Ho acquistato da un sito Cinese questo modello di smartphone clone del Samsung S4 :
Feiteng S4 i9500 H9500

Item specifics
Display Size: 5.0
ROM: 4GB
RAM: 1G
Display Resolution: 960x540
Band: Quad-Band
Design: Bar
Feature: with Touch Screen with MP3 with FM Radio With Ebook with WiFi Color Screen with GPS with Bluetooth with Email Dual Sim Card
Camera Pixels: >12.0MP
Memory Card up to: 32G
Operation System: Android
Sim Card: Ordinary SIM+Nano SIM
Chinese Brand: HDC
Network: GSM900 GSM1800 WCDMA GSM1900 GSM850
Language: Portugal Vietnamese Spanish Persian French Indonesia Chinese Norwegian English Dutch India Turkish Arabic Russian Malay Thai Italian German

Hebrew
Description
Product Name: HDC S4 i9500 H9500+ MTK6589 quad core smartphone 5.0 Inch IPS HD Screen Android 4.2.1 1GB RAM 4GB ROM 12.6MP Camera android cell phone
Short Description: Feiteng S4 H9500+ NOTE 3 5.0 Inch IPS HD Screen MTK6589 quad core smartphone 1GB RAM 4GB ROM 12.6MP Camera Android 4.2.1 OS android
phone cellphone we are china samrtphone agency any one you like you can tell me maybe you are wholeseller best price waiting for you !!--161659

Funziona perfettamente da quando l'ho acquistato ( marzo ) ma mi trovo in difficoltà ad aggiornarlo in quanto nelle info telefono delle impostazioni non si trova la voce aggiornamento software come su tutti i sistemi android.
Qualcuno ha notizie in merito agli aggiornamenti per il 4.3 di Android ??
Ringrazio anticipatamente