Estimation question

How many iPhones were sold in India in 2022?

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What this question tests

Structured estimation of a national product sales figure using population, income segment and market share assumptions.

Estimate India's population, around 1.4 billion, and the smartphone owning population, roughly 700 to 750 million.
Estimate the premium smartphone segment able to afford an iPhone, a smaller slice, perhaps 5 to 8 percent of smartphone owners.
Apply Apple's approximate market share within that premium segment, and an annual replacement or new buyer rate.
Multiply through to reach an estimated annual unit sales figure for 2022.
Sanity check the number against India being a growing but still small share of Apple's global sales.

Builds the estimate top down through population, affordability, and Apple share, stating each ratio explicitly.
Lands on a plausible range, for example 6 to 8 million units, rather than one falsely precise number.
Notes India's iPhone sales were smaller than China's or the US's at the time, as a sanity check on scale.

Overestimating the affordable, premium smartphone segment in a price sensitive market.
Giving a single overly precise number without a range or sanity check.

How would this estimate change over the next five years given India's income growth?
How would you validate this with real data?