His main reason? She might actually use it to answer his calls and texts.
Currently she owns her second mobile phone. We pay for it and the contract.
She uses it to stay in contact with mum only when she's at our house. It is nearly always switched off when dp phones her on it or it rings out and he is never phoned or text back. We have a court order which states we must provide a mobile phone for her to enable dp to have phone contact at set times.
When asked why she won't keep it charged at mum's or turn it on, she says she "forgets" but has it glued to her side when at ours. She has denied that mum is blocking contact.
I think his reasoning for wanting to buy her an iPhone is skewed and at best will make no difference to the current level of phone contact and at worst, will teach her that not keeping in contact with dad, is rewarded with a very expensive phone.