Beyond BlackBerry's (BB -1.62%) earnings and Fairfax Financial news, there are other signs of trouble for the Canadian smartphone maker. No. 4 wireless carrier T-Mobile has said it's pulling back all of its BlackBerry inventory because the devices aren't selling. The company would rather not carry the inventory risk. Sprint is willing to wait and see what happens before making any decisions, as the No. 3 carrier offers the Q10 on its network.

Carriers aren't the only partners skeptical of BlackBerry's prospects, as manufacturing partner Jabil Circuit (JBL 1.05%) now says it's looking to wind down its relationship with BlackBerry. Jabil dropped 10% on Thursday after it said it would recognize restructuring charges related to BlackBerry while also providing disappointing guidance. BlackBerry is Jabil's second-largest customer, so it's also feeling the fallout.

BlackBerry's woes are rippling to its upstream and downstream partners. In today's episode of Tech Teardown, Erin Kennedy discusses the latest BlackBerry news with Evan Niu, CFA, and Jamal Carnette.