Work around for AT&T DL72310 randomly blocking calls (no rings), Phone directory list was downloaded using Bluetooth method
I purchased 2 AT&T DL73210 from the AT&T online store, one in Feb. 2022 and the other in Oct. 2022. I discovered both phones exhibit the same problem. The phones randomly pick phone numbers in my downloaded directory (Bluetooth method) and block them. The phone does not ring and the call history may display a goofy number. For example: 506-d72-7973, 506-26d-766d, 456-*6*-6573 where "*" was an upside down "A".
I also had a AT&T EL52300 and a old dial phone connected to the landline during the blocked calls by the DL73210. I observed these 2 phones (EL52300 and old dial phone) would ring twice and then nothing. The caller would also hear 2 rings and then nothing. The call history phone number was displayed correctly on my EL52300.
I called AT&T support and the person was helpful addressing the problem. Initially AT&T requested that I contact my landline provider due to the wrong phone number recorded in the call history. Once I explained my EL52300 phone recorded the phone number correctly in the call history list, I was then asked if I used Bluetooth to download the directory from my smart cell phone, I said yes. We then cleared the directory list in the DL73210 (from menu option) and then removed power from base station plus removed batteries from all 3 handsets. Next: put the batteries into handset, power up base station, set time and date, manually put blocked phone number in directory, had the person call me and it worked. I then used the Bluetooth method and downloaded the directory again. The blocked phone number that was manually entered now works but 2 other blocked phone numbers in my directory still do not work and I also discovered my cell phone number is now blocked.
Additional observation: The random blocked phone numbers are displayed correctly in DL72310 directory list. You can call the random blocked phone numbers from directory and the calls correctly go through. The problem is when caller that is being blocked calls you, the number displayed in the caller ID or call history does not match the phone number stored in your phone directory. You may see goofy phone numbers with characters in the call history and caller ID.
I have manually entered all phone numbers into the directory which was a painful 2-hour process. Manual entered numbers so far appears to be working. I am not happy with the Bluetooth download directory method using your cell phone which was my main reason for purchasing the phone.
2 months ago
That's a long way to go to say the downloading of the directory via Bluetooth is giving invalid caricatures or numbers. If manually entering the information is correct, it's not the phones it's the process of the download. Can't tell you why I'd have to have the phones to try to figure it out. If you're following the process outlined to download the directory than the only thing I can think of is there's something in the directory of the cell phone the systems is reading incorrectly or doesn't like. If it happens again, I'd try deleting just the failed number and entering manually rather than manually entering all numbers.
2 months ago
Thanks Spoom2 for your response.
The reason for the lengthy explanation is this problem was difficult to trouble shoot and I am not sure if there will be a fix. I am interested if other users have a similar issue and can comment. It is difficult to know which phone numbers in the directory list will be randomly blocked since it could be years before I receive a call on some of the phone numbers in my directory. I like to have a reliable phone and entering all the phone numbers manually appears to be working so far.
I used an iPhone 7 plus and a iPhone 6S for Bluetooth downloading directory. I downloaded 75 phone numbers with the iPhone 7 Plus. I downloaded 100 phone numbers with the iPhone 6S. I also had to add a 1 before the area code for long distant calls to the phone numbers in my iPhone directories before downloading directory by Bluetooth to DL72310. My landline provider requires a 1 before the area code for long distant calls.