The bit I struggle with is when the wheels are firmly on the ground and you are taking a scenic tour of Heathrow and they still won't let you use a mobile phone.
In more advanced civilisations like the USA
, some airlines such as United do allow cellphone use after the landing runway is vacated up to the gate - in fact they go as far as to suggest passengers take cellphones out of the overheads before the seatbelt signs go for that very purpose.
Andy