Account set up failed after multiple attempts. Crashes when you navigate to sms page to get the OTP 4 digit code they send. Can't delete telephone number / Linphone account  as claimed not set up  yet can't start from scratch as telephone number is registered. Alternative set up  using sip account rather than simply phone number failed. Uninstalled then reinstalled  failed. Tried following day  failed. Says not communicating with server. Useless! Only tried to use this as a mate abroad doesn't want to use far superior WhatsApp (or Viber or Skype). Uninstalling as simply taking up space. This kr-app doesn't work!!