My iPhone is still in service center for about 2 weeks now and a MozRep Indonesia is kind enough to lend me Firefox OS phone. Used to all the fancy things iPhone had so far now I have to use a device that doesnt has all that luxury.
It’s a so-so device -compare to my iPhone- (well, the target market is not for people like me), I dont have many comment about it. But this young O/S is fun to play with, specially making mobile app using only HTML5/CSS/JavaScript in the client side.
The only problem, serious problem that I have is the ability to make a USSD call.
USSD is a protocol used by GSM cellular telephones to communicate with the service provider’s servers. USSD can be used for WAP browsing, prepaid callback service, mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network (wikipedia).
For example:
Dial *888# to check your prepaid balance
Dial *266# if you want to activate your roaming package offers.
and many things.
The ZTE Open I’m using now unfortunately having problem with USSD operation.
The symptom is whenever you dial a USSD Code (let say *888#) via dialler,
the app only show you “connecting” status for a while
and after that, dialer app is like closing the connection and back to dial pad screen



When you’re accessing the STK menu (which is more or less is executing USSD command)
You can get the first menu screen. But when you continue selecting any option from the menu, there’s nothing happen.

Operator in Indonesia use USSD for most of their services because of the easy to use menu and realtime communication with the backend. That’s why it’s a serious problem for Firefox OS/ZTE Open if this issue still occur.
So, is anybody out there using ZTE Open with Firefox OS v1.1?
Do you have the same problem as I do? I’ve posted a bug at bugzilla, but has no response yet.






Waktu 


Minggu kemarin saya menghadiri sebuah acara di Hotel Gran Melia yang diprakarsai oleh
selaku induk perusahaan dengan para akademisi (diwakili oleh ITB, UI, ITTelkom) serta mitra produsen perangkat telekomunikasi yaitu NSN, Ericsson, ZTE dan Huawei. Selain kick off R&D, diacara ini dilakukan pula demo LTE (long Term Evolution) itu sendiri (menggunakan perangkat dari Huawei yang di pasang di Jakarta) serta Dual Carrier HSPA+ yang dilakukan di Medan (Ericsson) dan Denpasar (NSN). Bisa dibilang ini adalah roadmap Telkomsel untuk tetap memimpin pasar layanan broadband berbasis selular yang saat ini telah dinikmati oleh sekitar 16 juta dari total 86juta pelanggannya. Layanan broadband existing sendiri saat ini menggunakan jaringan 3G dengan penggunaan lebih dari 5000 Node B atau BTS 3G.

Pasar layanan broadband wireless berbasis GSM di Indonesia ditandai dengan dikenalkannya jaringan UMTS 3G/W-CDMA. Kecepatan transfer data jaringan 3G mencapai 384 kbit/s di kondisi ideal. Ini merupakan versi upgrade dari GPRS yang sudah dikenal masyarakat sebelumnya. Teknologi 3G ini kemudian berevolusi ke HSDPA/HSUPA dan HSPA+. Teknologi tersebut terus berevolusi ke Dual Carrier HSPA+ (42Mbps), Multi Carrier (84Mbps), dan Multi Carrier yang didukung antena Multiple Input Multiple Output (MIMO) 2×2 (168 Mbps).