UPDATE 1-Samsung launches Galaxy S8 and dreams of recovery from Note 7
* S8 to go on sale on April 21 (Adds executive quote, analyst quote and retail prices at U.S. carriers)
April 28 National Oilwell Varco Inc's first-quarter profit beat analyst estimates, helped by strong demand for its services that prepare oil and gas wells for production.
Net income attributable to the company rose to $589 million, or $1.37 per share, in the quarter ended March 31, from $502 million, or $1.17 per share, a year earlier.
Excluding $19 million in pretax transaction charges, the largest U.S. oilfield equipment provider earned $1.40 per share, compared with the average analyst estimate of $1.38, according to Thomson Reuters I/B/E/S. (Reporting by Sayantani Ghosh in Bangalore; Editing by Don Sebastian)
* 2016 rate of return hit by negative currency impact (Recasts, adds CEO comment on Canada/US infrastructure)