adding money to account

[upthera44.livejournal.com]

When you are in Russia and you want to add money to your mobile phone account, how do you say that?

положить деньги на счет / добавить деньги на счет?

When you walk into a cell phone store and want to know whether you can make such payments there, how do you say that? Вы принимаете платеж телефонов? Something like that? I'm making these phrases up and would like to know how Russians actually say it. Thanks!