I make it a policy not to donate via phone call. I will, as always, send a modest donation by mail. I can't say it works this way for UGM, but in many cases: If you donate over the phone, the solicitor gets a cut of the money! I want my entire donation to go to the mission.
Received twice within a three day period, once in morning and once in evening. Caller ID provides no name (but does have phone ID present) but failes to leave message. I have put it on my telephone system's list of calls to block in the future.