Apple, which partnered with GT Advanced on sapphire goods, says it will continue to work with state and local officials as it considers its next steps.
GT's filing, which sends company's stock tumbling about 90 percent, surprises the market and suggests a breakdown in its relationship with Apple.
Buyers of the new phone may have to wait a while to get it as Apple supplier Foxconn struggles to ramp up production, says the Wall Street Journal.
China Labor Watch and Green America say the iPhone maker hasn't lived up to its commitments to improve worker conditions in a China factory.
Samsung's declining first-quarter financial results contrast sharply with those of Apple, but the drop in operating profit isn't as bad as it has been.
But Samsung says allegations China-based supplier HEG Electronics employes children under the age of 16 at its facility are false.
The German automotive supplier plucks Seval Oz from Google's self-driving car project to lead a new division focused on intelligent transportation systems.
In a move to condemn illegal child labor, the Korean electronics giant says it will reduce orders with the supplier by 30 percent.
The smartphone may not yet be officially unveiled, but a UK supplier is offering preorders.
The South Korean electronics giant says it will sever business ties with a supplier if its investigation determines violations occurred.