How much better does this work then previous model. What is the best dect phone that work with this thanks

This has improvements over the v.202 model by amended power in the unit to work with some VOIP providers that older call blockers wouldn't. It has 5000 numbers pre-programmed into the call blocker as opposed to 200 the v.202 had. It can also block 1500 numbers with the BLOCK NOW button instead of 1000 that previous call blocker models could do. So therefore, it has been improved but namely only the amount of pre-programmed numbers is the significant difference.I hope that helps?...

If my first action is to block all telephone numbers within one exchange of one area code, do I have 1499 remaining numbers that I can block?

Yes, you do. So for instance if you wanted to block ALL Jamaican (876) area codes with precedingexchanges you would only need to key in 876 as an area code block. but I would advise to input itwith a 1, 01 and 001 before it as sometimes overseas calls are spoofed with Country codes that candisplay differently on caller ID devices. So input them as follows...* * 7 # (beep) 876 # (beep)* * 7 # (beep) 1 876 # (beep)* * 7 # (beep) 01 876 # (beep)* * 7 # (beep) 001 876 # (beep)

Why can't 866-828-9088 be blocked? I have the area code and the 10-digit number listed on the blocker and my phone still rings.

When manually blocking calls in the U.S the caller ID protocol is different everytime a number calls you.The number may come through as 866 828 9088, it may come through as 1 866 828 9088, or even 01866 828 9088 or finally 001 866 828 9088 so you need to input a 1, 01 and 001 before the number.It should then successfully block any call from that prefix. I've said this time and time before though, that ifyou just use the BLOCK NOW button on calls, that you won't get any problems or issues. It's perfectly normalfor this number to show as a missed call on your call log, but that doesn't neccessarily mean it's rung and got through.Scroll through the call blocker and check how many times each of these numbers have been blocked for piece of mind.

Is it compatible with att wireless system?

I'm not sure what you mean by wireless. It doesn't work on cell phones. I own an AT&T cordless phone. To date the CPR V5000 call blocker has been working flawlessly. On the average, it has blocked about six calls per day. If there is a negative, I would say the only thing I wish it had was the ability to display blocked numbers as 000-000-0000 instead of 0000000000. I think hyphens would make it easier to see the blocked phone numbers. in addition, having a backlight in its display would make it easier to see it in the dark. All in all, I would Highly recommend this unit, made in the UK and not China, to anyone who gets nuisance phone calls. I rate it 5 out of 5 stars.

CPR V5000 Call Blocker for Landline Phones - You Can Manually Block All Calls with The Big Red Button - Pre-Programmed with 5,000 Known Nuisance Numbers - Caller ID is Required

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