Bell Mobility Inc., has been told it can't keep offering customers preferential treatment for its mobile TV application while it appeals a ruling by the telecom regulator that would force it to scrap that pricing model. Bell Mobility, which is owned by BCE Inc. , had asked the Federal Court of Appeal for an injunction while it appeals a decision by the Canadian Radio-television and Telecommunications Commission that it end its $5-a-month charge for Bell Mobile TV service.