Consumers could see their mobile and Internet telephone bills rise under a Federal Communications Commission proposal that would increase the amount such companies pay to subsidize telephone service in poor and rural parts of the country. The proposal, which has been floated by FCC Chairman Kevin J. Martin and would require approval by a majority of the five-member commission, aims to ensure that the government continues to raise enough money to finance the federal Universal Service Fund, which is projected to pay out $7.3 billion this year.