evleaks reported sometime back that Lumia 530, the Lumia 520 successor will be heading to T-Mobile as Nokia Rise. They now mention it will also go to AT&T by way of Cricket wireless and will be named Nokia Rock. Though it is claimed to be coming in Q4, which looks bit surprising to me.
Lumia 530 may have a 4.3 inch display with 800x480p resolution. It may come with on-screen navigation keys and without camera button. Sometime back we reported RM-1027 from GFXBench, which looks like Lumia 530 only.