HSPA+42 is will be capable of 42Mb/s down, though expect the true speeds to be somewhere around 21Mb/s. Regardless of the halving, 21Mb/s down is, well, awesome. My Comcast broadband at home tops out at an average 20Mb/s. For comparisons sake: Sprint’s WiMax can burst up to 10Mb/s, Verizon’s LTE customers can expect the same 10Mb/s burst and AT&T customers can just hope the file is downloaded before the battery dies.
When the next generation of T-Mobile’s HSPA network is rolled out, customers using HSPA+ devices will see an increase in speed but will be unable to take full advantage of HSPA+42; mirroring the effect 3G devices saw when HSPA+ was rolled out.
[via All Things Digital | Read at Into Mobile]