The document analyzes Apple's strategy in partnering with mobile operators in different markets. It proposes that Apple likely uses a "Strategic Calculator" to determine which operators to partner with based on factors like Average Revenue Per User (ARPU). Operators with high ARPU that can offset iPhone subsidies without decreasing profits are most appealing. Apple also considers an operator's market share, preferring smaller operators that have more to gain in market share. The document analyzes different partnership scenarios based on these factors to understand Apple's strategic decisions in entering new markets.