Users are complaining of four basic problems. And notably, they are the same ones that handset makers and carriers in Europe and Asia had to deal with when they started to roll out 3G systems in those regions:

1. Speed of the 3G network is often not as fast as it should be.
2. Switching between the EDGE and 3G networks leads to broken web sessions.
3. For some, the switch between the networks leads to dropped calls.
4. Weak battery life.

A report on BusinessWeek.com today sheds more light on the issue, though there is still no official comment from Apple. According to the report, the problem is impacting 2-3 percent of iPhone traffic. BW cites an unnamed source who notes that considering 1 percent of AT&T calls get dropped, this is a problem, but not a catastrophe.

AT&T: Network Is Fine

AT&T, displaying a classic head-in-the-sand attitude, issued a statement that said, “Overall, the new iPhone is performing just great on our 3G network.” Right, and overall, the Yankees are on target to win the MLB World Series! If it’s performing so well, why are so many people complaining?

Ask anyone in San Francisco or New York and they will make your ears bleed with their tales of iPhone 3G woes. When we asked our readers about their experience, a majority said they were getting speeds only marginally better than the original iPhone. BW offers some clues as to what the problem might be:

Part of the role of the Infineon chip is to check whether there’s enough 3G bandwidth available in a given area. If 3G isn’t available or there isn’t enough bandwidth, the iPhone will be shifted to a slower network. One source says Apple programmed the Infineon chip to demand a more powerful 3G signal than the iPhone really requires. So if too many people try to make a call or go on the Internet in a given area, some of the devices will decide there’s insufficient power and switch to the slower network—even if there is enough 3G bandwidth available.

Apparently this is resulting in problems in areas of high iPhone density — aka San Francisco, Boston etc. — the very markets where Apple has both a strong retail presence and higher-than-average mind share.

Antenna & Weak Signals

Meanwhile, Swedish magazine Ny Teknik is citing unnamed experts that have come up with yet another theory:

… the most likely cause of the 3G problems is defective adjustments between the antenna and an amplifier that captures very weak signals from the antenna. This could lead to poor 3G connectivity and slower data speeds.

And when I tried to test their theory, it made sense. I currently have three 3G handsets — Nokia E71, Nokia N78 and Sony Ericsson U750a — all of which are optimized for the AT&T 3G network. The speeds on those phones are much faster. Similarly, if I pop a 3G SIM card into one of the USB modems, the speeds on AT&T network are quite fast.

Its the 3G Stupid

Finally there is our friend Mike Puchol, who explains how wireless networks work and outlines some of the problems associated with 3G technologies. In his view, the problem is shared bandwidth:

…key issue to remember is that the download rate is “per tower”, not per user. So, if two users using HSDPA are on the same tower, they will each get a maximum throughput of 3.6Mbps. Divide even further, and the more users you have the worse experience everyone gets.

His explanation also makes sense, and ties in with an earlier post of mine in which I looked at the backhaul problems facing U.S. 3G networks and asked whether or not they’d be able to withstand the iPhone 3G stress test.

I get the feeling that this issue isn’t going to die anytime soon. If you have theories, please share them with us.

The company will launch new mobile games, an online music store and a sophisticated lifestyle mobile brand Supernova as a foil for Apple’s iPhone when it is launched in India.
Nokia India also unveiled on Monday its Nokia 6210 Navigator phone, which is the company’s first GPS-enabled mobile device. It has an integrated in-map compass for guidance.

The device also features a 3.2 megapixel camera, MP3 player and stereo FM radio. The phone has been priced at Rs 18,000.

Nokia now has 10 devices in the market that have the personal navigation feature including the Nokia N78, Nokia 6110 Navigator and Nokia E90 amongst others.

Devinder Kishore, marketing director, Nokia India, said Nokia 6210 Navigator comes with pre-installed maps of eight cities including Delhi and NCR, Jaipur, Ahmedabad, Pune, Mumbai, Chennai, Bangalore and Hyderabad.

“Maps of additional cities will be added later,” he said. Kishore also said Nokia India is all set for the 3G rollout. He also dismissed the buzz about 3G compatible phones being unaffordable.

“The costs of these phones would be around Rs 7,000-Rs 35,000. The company currently markets around 30 3G compatible devices in India,” he said.

The mobile manufacturers are competing with each other to provide the best mobiles with attractive deals to grab the attention of the modern mobile users. Among these attractive and stylish mobile phones, the Nokia N78 is the one that allures the users with its multimedia features. This power-packed mobile phone from Nokia comes with world class functionality and it offers an incredible experience of having a mobile phone to its users. This highly durable mobile phones has dimensions of 113 x 49 x 15.1 mm, 76.5 cc and has a weight of 101.8 grams that allow its users to carry it with ease in their palms. This GSM-enabled mobile phone has a vibrant 2.4 inches TFT screen display with 16M colours and has a resolution of 240 x 320 pixels that allows its mobile users to have clear and bright images on the screen.

This sleek mobile phone comes preloaded with numerous advanced technology features such as Class 11 GPRS, HSCSD, class 32 EDGE- 296 / 177.6 kbits, HSDPA, WLAN - UPnP technology, Bluetooth v2.0 with A2DP connectivity and USB v2.0 support. This attractive mobile phones comes with a 3.15 mega pixels camera comes with a astonishing resolution of 2048 x 1536 pixels along with autofocus, Carl Zeiss optics, video(VGA 15fps), flash and a secondary CIF videocall camera that allows the users to capture the valuable moments in their life and making video calls. The MP3/M4A/AAC/eAAC+/WMA player and Stereo FM radio with RDS of this mobile phone allow the music lovers to stay connected with their favourite music and offers high-quality and crystal clear sounds. High speed Internet connectivity is possible with its excellent features such as WAP 2.0/xHTML, HTML and RSS feeds.

This mobile phone comes with messaging options such as SMS, MMS, Email and Instant Messaging that allow the users to get engaged with sending and receiving messages. It has a standard Li-Ion 1200 mAh (BL-6F) battery offering an approximate standby and talktime of 320 and 4 hours 20 minutes, respectively. The 70 MB internal memory of this mobile can be expanded by using a microSD card that allows the users to store thousands of their favourite songs and video clips. Apart from these features, it comes with GPS, the most advanced technology feature that helps the users in locating the exact place where they are and to show traffic rules and indications.

The Nokia N78 comes in black colour to grab the attention of the stylish mobile phone lovers. If you are looking for the best and multimedia features mobile phone, this is a perfect choice to satisfy your needs. Definitely, it makes you to feel proud of having this fashionable mobile phone with you.

Un test complet du petit frère du N82 par Mobi France

El nuevo terminal de la gama Nseries, tiene unas dimensiones de 113×49x15,1 milímetros y un peso 101,8 gramos.

Pantalla QVGA de 2,4 pulgadas, 16 millones de colores y 240×320 píxeles de resolución. Cámara de fotos de 3.2 Megapíxeles con óptica Carl Zeiss en la parte posterior y cámara VGA frontal para videollamada.

También cuenta con grabación de vídeo en MPEG-4 de hasta 15 cuadros por segundo, reproductor de música para varios formatos con rueda táctil Navi que sustituye a los controles específicos de audio, y sintonizador de radio FM y radio en Internet.

La memoria interna de 70 MB no es gran cosa, pero esto lo compensa su ranura de expansión de para tarjetas MicroSD.

La característica más notable del N78 es el navegador A-GPS que podrás usar en la navegación GPS y geoposicionar tus fotos.

Esta dotado con conectividad Wi-Fi, Bluetooth estéreo con A2DP y transmisión de datos a gran velocidad con la tecnología HSDPA.

Su batería le brinda una autonomía de 4 horas de conversación y hasta 320 horas en espera.

Si no hay novedad dentro de poco os podre hacer un analisis del producto.Mientras tanto si ha alguien le interesa algun aspecto en concreto, esponer las preguntas e intentare desponderlas.

Un Saludo

Visto en Sarrianet , BlogMoviles