Sprint hopes to stand out from both Verizon Wireless and AT&T, both of which have since terminated their "all you can eat" data plans in favor of tiered pricing plans.
All three US carriers will now be selling the same iPhone 4S model, but Sprint, like Verizon, will only be using its CDMA capabilities, which offer limited data speeds. The new phone's support for 14.4 Mbps HSDPA service will only be of potential use by GSM/UMTS mobile carriers like AT&T, although even AT&T won't be supporting the iPhone 4S' full potential, at least not from the start.
In addition to its unlimited plan, Sprint can also tempt users in some areas with better service coverage. In some cities, such as San Francisco, Sprint appears to have better mobile coverage than its competitors, although this difference is specific to certain cell tower locations.
iPhone users on Sprint may also find they have less competition for the company's network, particularly when they're in areas where there are already lots of iPhone users saturating the bandwidth of AT&T or Verizon.
"We have every confidence in the ability of our 3G network to handle the influx of devices we expect to get. It certainly hasnât been an issue to date," Sprint spokesperson Michelle Leff Mermelstein told the Journal.
Global mobile roaming
The world-mode compatibility of the new iPhone 4S also means that Sprint and Verizon users will be able to take their device roaming on foreign networks, most of which are compatible with GSM/UMTS.
AT&T will remain the exclusive carrier of the GSM/UMTS-only, 8GB iPhone 3GS, which will now be subsidized for free with a contract. The existing iPhone 4, now reduced to being available only as a $99, 8GB model, will remain specific to GSM/CDMA in the US, with Apple's website noting that the model "will only work with the carrier you choose."
Apple's site notes that the 8GB iPhone 4 is "coming soon" to Sprint, indicating that the new third US carrier will sell both the CDMA-only iPhone 4 as well as the global, dual mode iPhone 4S.