I see that this thread is old, but I found the work around. It IS crickets security or whatever manages their website, but since Apple hides your IP across websites, cricket throws you out of their site. 
 

anytime you want to use a cricket service, you have to go into settings>safari> and disable “prevent cross-site tracking” and change “hide IP address” to trackers only. 

getting cricket wireless was a huge mistake. Fist I’m told I can use any ATT compatible hotspot for a data plan. I get one and then my account is suspended because it’s not compatible. I was getting d/l at 28mbps with it vs the 3mbps with the device from cricket, so I have no idea how that’s not compatible. The device is also on the ATT whitelist for the 3g shut down.

I closed that line and am using the hotspot device on ATT perfectly fine now. As soon as I closed that line my cricket account became entirely inaccessible and I ended up having to make a new one. I was told me old account was too old. It was made in early Feb, maybe the 5th or 6th of 2022.

Well I made a new account anyway and have about 5% luck logging in to that. Chat keeps disconnecting, The only advice I get is to use the app on my cricket phone. I have my laptop connected to that devices hotspot to make sure I’m using a cricked IP and I can’t log in. 

This is not just about ad-blocking software, it’s about a war on our privacy.  I had to use my work laptop in order to make a payment and the only difference is the VPN in use.  Our corporate overlords have decided that we are not allowed to block ads, use privacy-oriented VPN like TORGuard (even though most security experts agree it is a vital security measure) or anything else that interferes with monitoring our every action and every detail about us, all around the internet and into the real world (like the law-enforcement license-plate monitoring/tracking camera programs quietly growing all over the place in a blatant violation of the 5th amendment.)

This is not acceptable.  I am a human and I have human and civil rights.  Corporations are not people (I don’t care what SCOTUS says) and organizations (even nations) have little or no rights - rights belong to living or conscious beings.  Cricket has NO right to forbid me from using ad-blockers, VPN or any other privacy or security measure any more than my grocery store has a right to tell me not to lock my front door.

Change is coming and the oligarchy can’t stop it.  If Cricket wants to exist on the other side of the change, they’ll need to accept the truth - humans are in charge, not corporations.  Right now I don’t see many corporations accepting this fact and when they are all shut down or converted to public utilities they will whine and cry most piteously:  “But we own the world, including you, not fair!”

I also have this issue and was told the only way to connect to my Cricket account was to use mobile data and that there was a security issue using home WIFI?? Really after using it for all my credit/bank and medical updates there is an issue with security for my phone account...sounds a bit like a cover up for a problem they have but can't solve.

I’ve had this problem for years with the same results...funny how the first few years I was with Cricket I never had a problem...I too live in a rural area and only receive 1 or 2 bars on a good day and it’s like 2G.  I gave up spending hours upon hours with customer support trying to resolve.  There isn’t one other site that I have this issue logging into so it must be on Cricket’s end.  I wonder how many thousands of customers have the same issue but don’t ever say anything.

Do you enjoy lying, James? I'm not the only one who has the login issue. Chalking it up to it being my IP relating to a WI-FI network is a huge deflection. It's been OVER A YEAR since people have started talking about this issue, either on this forum itself, or on other sites like reddit. I've done my research. On my pc, when I am HARDWIRED to the router, I am unable to login, and I get the error saying that access to myAccount (a service, not my particular account), is unavailable, call our customer service hotline for help. I have DONE this. They did not help! They did not offer any solution other than use data and just Keep trying. I live in a rural area, James. I'm lucky if I get 2 bars. I consistently get 1, which apparently, most of the time, isn't enough to even load a site like google or facebook, on my phone. HOWEVER, I will be fair and say it sometimes does work. So on my phone, on wifi, RIGHT NEXT TO THE ROUTER, because it is literally ON my desk. I cannot log in. I get the same error message in a banner across the top of the page. On my phone, with data, again, I consistently get ONE BAR OF SIGNAL STRENGTH. Because I live in a RURAL AREA. This is the best I am going to get, unless I go out of my way to another part of town, JUST to be able to get a better signal. Another part of town I might add, that would be miles away from where I actually live.

Frustrated because this issue is still ongoing, I talk to your cricket support account on Twitter. I told them a shortened version of what I am saying right now, All they told me was to switch internet connections. WHAT? As if I somehow miraculously have access to a SECONDARY internet access point where I live. In a Rural Town. Not even IN town, on the outskirts of town near an even SMALLER rural town. The internet I currently have, IS the only internet I f*cking have, James. It's so amazingly laughable that that is your gusyes solution to me being unable to log into my own account on your website, OR the app is to just connect to different internet. What internet? Where is it?

Oh, but it's not just being unable to log into my account. On data, on my ONE bar, rarely two, I am unable to solve captchas on your website, period. This makes it almost impossible to reset my password, Which I so badly need to be able to do, because I lost what my password was. It only works on wifi. Or when I'm hardwired to the router. Imagine that? But anything relating to actually submitting the process to resetting my password, logging in, any of it, is impossible to do on wifi/ethernet. So after solving the captcha on internet, I have to switch back over to data. A HUGE annoyance, that I have to keep switching back and forth between data and internet just to be able to access different functions of your mobile site. I try to submit the information. Imagine, if you will, my surprise then when, oops! It didn't go through! No error or anything, it just didn't work. Prompting me to once again, try and solve the captcha by pressing it. But it won't work on data! Back to internet! But what's the point? I've done this multiple times, hoping it will work the next time, maybe if I wait, it'll work then. Nothing. It still refuses to go through. So not only can I not login on actual internet, now I can't even login on DATA, because I accidentally overwrite my autofill, of all things. :) 

Trying to buy a new phone to upgrade my phone after mine started falling apart was a literal laborious event. Now, I have my new phone. I'm trying to activate it! But once again, I can't do it on my pc, or my phone on data. I get "unknown error". I try on data on my phone, it works, oh, except. I need to login to finish it. BUT I CANT F*CKING LOG IN, JAMES. BECAUSE MY AUTOFILL GOT OVERWRITTEN, AND I CANT ACTUALLY RESET MY PASSWORD, BECAUSE YOUR MOBILE WEBSITE, DOESN'T F*CKING WORK.

You, or ANYBODY else who works at this company want to tell me again you do not have account access issues or website issues related to login? You wanna try that again. Fix your f*cking website. It's not my "IP" or "wi-fi", it's you.