But in cases of firms like Aircel, for instance, it can trade most of its liberalized 2300MHz spectrum with Vodafone or Idea – trading with Bharti Airtel could run up against the caps which prohibit a telco from owning more than 50% of the spectrum in any band or 25% across all bands.
Analyze the relationship between 'Bharti Airtel' and 'Vodafone' within the context of the input sentence.
Options: owned by, distributed by, headquarters location, subsidiary