Offered just a few weeks in the past, the Verizon iPhone 4  is now available in pre-orders only for Verizon wireless customers. On February 9, it will be available to everyone else: its arrival could redistribute the cards in the U.S. mobile game, while Verizon has been a major carrier of Android devices. The media had access to run some tests, and initial feedback is quite positive.




iPhone 4 is also available in two sizes: the 16GB model which costs US $199 and the 32GB model which costs US $299. All these devices will ship on 10th February 2011.

Head over to Apple Store site now, or on Verizon site to pre-order yours before it gets too late !

An iPhone 4 for Verizon
Begin by recalling that this iPhone 4 is a model designed for the Verizon network.  AT&T uses the GSM (2G, vocals), EDGE (2.75G, voice or data) and UMTS (3G, channels and data). Verizon, by contrast, uses a CDMA network and CDMA2000 (3G, voice or data). Co-developed by Qualcomm and the U.S. military, the CDMA protocol is incompatible with the UMTS protocol: Since 2007, the iPhone could therefore function at many operators around the world, but not for Verizon.


The Verizon iPhone 4  is an iPhone with a CDMA chip. Some CDMA phones are also equipped with a GSM chip that allows them to make and receive calls abroad: this is not the case for the iPhone Verizon, which will therefore only work in the United States, and only on the Verizon CDMA network (not on the CDMA network of Sprint, another U.S. carrier, nor on other CDMA networks in Asia or Latin America, the frequency bands being different). The remaining components of self through the raw performance is identical.



Network Performance
Because of its design, the CDMA protocol has always been higher protocol GSM / UMTS in terms of votes. UMTS networks are catching on data: they are generally faster than CDMA2000 networks with data rates much higher, especially in the case of variations HSDPA (3.5G) and HSUPA (3.75G).

Unsurprisingly then, the iPhone 4 Verizon behaves better than his twin brother during calls, in both sound quality and number of unwanted disconnections. “In six days of use, I found that the quality calls on the iPhone 4 Verizon was substantially higher “ says John Gruber. Engadget makes the same diagnosis:“After a few days of use, the fear that arises usually after five minutes of calls with AT & T disappear” . One downside: in places where Verizon coverage is low, unwanted disconnections are legion.

iPhone verizon

This is not the only problem: like EDGE, CDMA networks do not support voice and data simultaneously. We can not and, during a call, use the Internet connection.Unlike EDGE, however, we may receive a call while using the data.

Modem mode
This is also the main problem of WiFi hotspot, another new feature of this iPhone 4 Verizon: Using the iPhone as a WiFi modem 4 will be cut if an incoming call.

The current iPhone can be used as a modem via USB or Bluetooth. Verizon iPhone, comes with iOS 4.2.6, adds the ability to use the modem in WiFi: This mode should be available on the iPhone 4 “normal” with iOS 4.3 … the whim of the operators.


The operation of this mode is transparent: it is activated in the settings General> Network , and provides a default network protected by a password composed of two separate words with numbers – you can then connect to PC, Mac or iPad .They are about 5% of battery charge that vanish every 20 minutes, but if nothing is connected, the connection seems to cut it after 90 seconds.

The service is paying ($ 20) and will certainly be more useful in other operators as Verizon. The limitations of the CDMA network is being felt particularly the problem of disconnection in case of appeal, but also in terms of throughput. The measurements made in various tests show that the network of AT & T is about 2 times faster than Verizon for download, 3 to 4 times faster upload with a similar latency.


In short, the first tests of the Verizon iPhone 4  are pretty good, even if they insist on the limitations of the CDMA network from Verizon. Whoever phone before anything can be seduced (by Antennagate there is no question), while data-intensive user may prefer the network of AT&T.


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