How do I limit access to my cellphone booster?

@sheri jo  You can't. The Cell Booster is an open system, unlike its predecessor, the MicroCell, where you could restrict access by phone number. Anybody with an AT&T phone that meets the post-3G cellular requirements, and within range of your Cell Booster can access it. However they won't know what they are connected to because the only indication of the connection is that the phone displays LTE. Cellular data will be counted against the connecting phone number. Data across your internet connection is a different matter. I've been pushing AT&T on clarification on that but so far the answer I've received is less than satisfactory.

If you don't like the open system of the Cel Booster you can always switch to WiFi-C (WiFi Calling), which is what I will do once I'm done testing and evaluating the Cell Booster for AT&T. See my Tech Guide, link is in my sig line, for all things Cell Booster related.

you cant, anyone connected to your booster uses their own data not yours

This is less than ideal to put it mildly. Why should a neighbor benefit from something I bought and paid for?! Get it together AT&T and fix this. 

I'm moving this thread to the Wireless forum.

@SaltyCajun82  Not gonna happen. The downside of the Nokia Cell Booster is that there is no longer a whitelist, based on AT&T phone numbers, that you can use to allow access. The MicroCell allowed this but not the Cell Booster. The Cell Booster Pro is supposed to have this feature but it has not worked well for most folks since its release. 

Realistically, unless you live in an apartment or condo, where you share a wall with your neighbors, a neighbor accessing the Cell Booster for long periods of time is few and far between. The signal propagation, at least in my testing earlier in the year, is really subjective to interference (structural) so the output signal is not that great or is certainly variable. 

I only activate mine every few months to keep my account active and to receive any updates that may be available. I use WiFi-C exclusively which is much more reliable and robust for us.

My neighbor is constantly on the phone and connected to my booster. I know because she has ATT and i constantly see the in use light flashing on my booster. Any time that its in use all my incoming calls get routed to my voicemail. ATT completely botched the release of this cell booster and they have absolutely no one that that can offer technical assistance as their techs and customer support in India have absolutely no idea what they are doing or what you are even talking about when you call them about the booster. 

After literally a month and multiple phone calls they finally told me that my calls are being routed to voicemail because the booster is in use during the times of those incoming calls. I have zero service at my home with ATT. 

Just today I missed 2 business calls because they were routed straight to my voicemail. It is now affecting me financially. 

They are about to lose a customer who has had ATT for 25 years. They have become the most inept company I have ever dealt with. Just 2 weeks ago they said they were going to credit my account the amount I paid for the booster because they could not provide a solution to my issue, instead they credited me $60. 4 months ago when I was forced to purchase the booster, because they ran out of the free upgrades from the 3g micros in 1 frickin day, the guy told me to purchase a booster from their online store, and he would authorize a credit of the purchase price, to which I received zero credit. 

They have outsourced literally everything overseas and they wonder why the are losing customers to the competition. Its wild how poor their customer service has become. They straight up will lie to you just to get the call closed. 

My advice is to ditch ATT if you have any other options where you are. 

🤦‍♂️Nokia botched it AT&T didn’t. 

Well it doesn't make any sense that the since the booster can handle multiple phone calls that any one time. (8 users) 

I don't know how close your neighbor is, but you can resolve the problem by unplugging the booster and using Wi-Fi calling. Your neighbor can't piggyback over your password and Wi-Fi.

Just an fyi, if you have neighbors that use Verizon in t-mobile, the booster they sell is identical to the one that AT&T is now providing. It's been the complaint about the Verizon cell booster for years - anyone else in the area with Verizon service can also piggyback off the same booster.

cant say I am surprised that the technician had no idea what he was talking about. They will say whatever they can to get you off the line and close out the call.

unfortunately wifi calling does not help either as I cannot text my employees with Androids or any customers with androids and for some reason the network still tries to connect to the tower despite there being no service at my residence and the wifi being set up properly with open ports and meshed with 3 different access points.

I am likely to switch providers specifically because of how bad ATT customer service has gotten. Its beyond unacceptable at this point.

And regarding Nokia botching the release, I do not disagree, but ultimately its ATTs job to fix the issues as its their service and their responsibility.

@Amessing  The Cell Booster can handle up to 8 simultaneous users so there is no reason your calls should be going to voicemail unless the maximum number of users has been reached or exceeded.

Calling Support has always been an issue because Support just doesn't have the tools or resources to handle even basic questions about AT&T's femtocells (the original MicroCell and its updated version, the Cell Booster and Cell Booster Pro). That's why I wrote the Cell Booster Technical Guide (link is in my sig line). 

@Constructive is correct. Nokia is the mfr for the Cell Booster and it is based on one of their line of devices. I'm not sure how much input AT&T had in the design features but my guess is very little, other than the bandwidth requirements. AT&T just wanted an LTE "plug and play" device to fill in the gap that the demise of the MicroCell left.

Can you do WiFi-C (WiFi Calling)? I tested the Cell Booster for a period of time for AT&T but switched back to WiFi-C because it was just more reliable.

EDIT: I just saw your response to @formerlyknownas . We have no issues texting to Android users from our iPhones or vice versa when using WiFi-C. Your phone will connect, or attempt to connect to the strongest signal, be it a local tower or the Cell Booster. Signal strength will vary but some phones can handle that better than others. If there is no detectable tower signal strength, the phone will attempt to connect to the Cell Booster. The same for WiFi-C. In your case I would use either the Cell Booster or WiFi-C, not both at the same time. In my testing experience, I did not have any issues leaving WiFi-C enabled as well as having the Cell Booster active. My phone would just connect to whichever had the strongest signal, which was usually WiFi-C. Disabling WiFi-C, our phones would usually connect to the Cell Booster but would sometimes connect to the incoming cellular signal if it was the stronger of the two.

I have a mesh WiFi system with two satellites (one hardwired for the backhaul and the other wireless for the backhaul,) both upstairs with the router downstairs. No issues whatsoever.

What kind of phone do you have?