If you have a UK landline try just http://www.just-dial.com
- first call http://www.just-dial.com (084 4720 0990 for landlines in Turkey) before your international number and pay ~1p
- first call http://www.just-dial.com (084 4904 0990 for mobiles in Turkey) before your international number and pay ~4p
If you have a UK three mobile phone try http://www.dialacode.com
- dial the http://www.dialacode.com prefix (290429 for landlines in Turkey) before your international number and pay ~5p
- dial the http://www.dialacode.com prefix (290729 for mobiles in Turkey) before your international number and pay ~8p
Note : These prefixs sometimes change so check http://www.just-dial.com and http://www.dialacode.com sites for the correct prefix for your international destination and for latest prefix to use