Not an internet access issue. "Cannot connnect to iTunes Store" appears when using App Store or iTunes icon. iTunes software is up-to-date. Have tried restarting and resetting iPhone. Have deleted all settings and restored from backup. Local Apple store exchanged phone and music, apps, etc. installed as new phone - not from backup. Everything worked for about 3 weeks. Now "Cannot connnect to iTunes Store" again appears / no access to iTunes. Ideas?