Answer:
The strategy being used is price bundling
Step-by-step explanation:
Price bundling is the sale of complimentary goods as a single package at a heavily discounted price.
In addition to price bundling,businesses sometimes try to use a lock-in strategy in order to lure customers to buy other related items.
The lock-in strategy that arises from price bundling can be categorized into -first a situation a low price is sold with the intention of selling a higher price article to customers thereafter and secondly a situation where highly priced is sold with the hope that the customers would other cheap complimentary ones.
The latter was used by the phone provider.