The consumer is always right. That is, until they start talking on a mobile phone.

Workers in cafes and shops across Sydney are refusing to serve customers who are talking on their mobile phones, saying it is rude and they deserve more respect. In many stores signs have been placed to remind customers of their modern-day manners.

No mobiles while ordering take-away coffee: Phil Xu from Katipo cafe in Bondi. Credit:Edwina Pickles

But Russell Zimmerman, executive director of the Australian Retailers Association, said in today's economic climate retailers shouldn't risk snubbing customers, even if they were on the phone.

"Business is pretty tough and I don't think that a retailer can afford to ignore any customer," Mr Zimmerman said. ''To simply say, 'I am not going to serve you if you're on your mobile phone' is a little bit harsh."