Prepaid Lumia 521 is back in stock at T-Mobile. Hope the new stock is enough to last for few days. Also, at HSN and Walmart it has been out of stock for quite long now. So, may be Nokia focuses on making it available soon.
Lumia 521 is certainly in-demand in US. Yesterday, T-Mobile started selling Lumia 521 both on wireless plans and without annual contract (Prepaid). Check now and the prepaid stock is sold out. Though prepaid pricing is $199.99 which is highest yet for Lumia 521 compared to $149 at HSN and $129 at Walmart, but that didn’t stop people from buying it from T-Mobile. Hope, they get new stock asap along with HSN and Walmart!!