Food stores are open from 7am and many of them stay open on Saturdays till the evening. Many tourist shops in the centre are open daily till 8pm. Banks open from 8am to 5 or 6pm Monday to Friday. The Czech telephone system is antiquated, and you may have to dial the number you want at least three times before getting through. The majority of public phones in the centre of Prague take only phone cards, currently available in 50 and 100 units from post offices, tobacconists and some shops.
Phone cards are good for local, long distance and international calls.
The international code from the Czech republic is 00 followed by the country code, area code and the number. For the international operator dial 0135. The country code to the Czech Republic is 420. Area code to Prague is 02. For more information about telecommunication in the Czech Republic go to Czech Telecom official pages .