Apple has held exploratory discussions about using Intel and Samsung Electronics to produce the main processors for its devices, Bloomberg News reported on Monday, citing people familiar with the deliberations. Apple executives have made visits to a Samsung plant under development in Texas and, separately, also held preliminary talks with Intel about enlisting the company's chipmaking services, Bloomberg reported. While the move would offer Apple a secondary option beyond its longtime partner Taiwan Semiconductor Manufacturing Co, the iPhone-maker is also concerned about using non-TSMC technology, the report said, citing worries about reliability and scale.