https://www.reuters.com/article/us-sprint-corp-m-a-t-mobile-us/sprints-quarterly-loss-narrower-than-estimated-merger-expected-idUSKBN1CU0FN >Sprint Corp reported a narrower quarterly loss on Wednesday than analysts estimated as it added subscribers, and the wireless carrier declined to hold a post-earnings conference call amid expectations of a merger with rival T-Mobile US Inc .