"invalid SIM" messages - Moto G6 Questions & Answers

Moto G6 Google Play version
Phone gets "invalid SIM detected" messages throughout the day. After a few seconds or minutes, the network comes back on line. I've reinserted the SIM multiple times to no avail.
This is a refurb replacement for a new phone that died within a week. (https://forum.xda-developers.com/mo...tory-reset-t3880961/post78471445#post78471445) We didn't have SIM issues with the other phone.
I'll try to get a new SIM from Fi, but I'm worried it's a hardware issue.
Has anyone had any SIM problems? If it's the tray I would have to send in for a second replacement within a month. The Boss is getting pissed off at having to swap phones so often.

That only happens on mine when I update the profile. Sounds like either a hardware or network connection problem. I'm sure you already surmised those 2 things yourself.
Sorry I wasn't more help

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Problems with Unlocked Kaiser on AT&T

I've had my unlocked HTC Kaiser for 2 months now on the AT&T Network no problems. On Thanksgiving Day, my phone decided not to turn on after I left the phone to charge overnight. I figured it did not get a good charge so I tried recharging it. It was flashing red lights near the the top of the phone. So I go into AT&T on Friday to see if its the battery or the european charger that may be at fault. I played around a few combinations in the store and it suddenly/magically turned on. (I decided to buy the charger and extra battery anyways). The employee decides that for some reason or another, the phone needs a SIM Card. Well here is where everything went downhill.
After the new SIM card, I was unable to make or receive any calls, and no access to my data plan. Sometimes, I would have full signal bars but still was unable to make/receive phone calls. I've been able to make calls on very rare occasions; especially in this room in our school. What to give? So I went into another AT&T store and noticed that they had the incorrect IMEI number down in their system,. I asked for them to fix it but they said they couldn't change it for some reason and that the IMEI wouldn't be causing the problems I'm experiencing. So I finally called Customer Service Support on the phone and supposedly they were able to change it to the correct IMEI #. But still the same issues. I've done soft, hard, master resets, take out the battery + SIM card, you name it and still the same problem! When I took the SIM Card out of my phone and put it in a Blackberry, it did work! But when I took the Blackberry SIM Card into my phone, it did not. The support team told me that indicates that it is my phone; but I clearly told them that it could also be due to the fact that the towers just aren't recognizing my device no longer.
So I spoke to HTC about this and they said its the SIM card and they wanted me to go in and get another SIM card. So I went into AT&T today and got a new SIM card but same problem. Again, same issue. So I called AT&T Customer Support today and asked them to bump me up to Level II or III support. She says she cannot do that because my phone is unlocked (from HTC) and no support for that. I gave her the rundown on how my phone was working for 2 months until they put in the new SIM card and my cell phone activity clearly show that. Then she goes on to mention that other technical service reps that have helped me in the past few days clearly have pointed the culprit to be my device and not AT&T as they have exhausted all tests. And I told her, it's like taking a brand new car to a mechanic and then get the car back not running. If you ask the mechanic what did you do to my car, he's not going to admit to anything. She says that my device isn't being recognized by the towers. So then I brought up the point of "So is it my tower or is it really my phone?". I told her it's no problem getting a new phone but if I get a new phone, will it be unrecognized by the towers again. She said yes because it is unlocked. I said what about the thousands of other people who use unlocked Kaisers or any phone for that matter as they seem to have NO problems. They basically want you to buy the phone directly from them.
In all, I've spent nearly 10 hours on trying to get this thing to rework and be able to place/receive phone calls. Whether this is due to the events which ensued after the red light indicator on Thanksgiving Day OR the fact that AT&T switched my SIM Card and caused my device to be undetected by towers (whether it was due to the fact they put in the wrong IMEI in the first place or any adjustment they made to my account) remains to be determined.
The only options that remain is: 1) Go to TMobile and try out their SIM card on my phone and see if it works. I highly doubt they too will let me do that as they consider phone unlocked and don't want to help 2) Get a new phone through HTC and hope it'll work on AT&T again.
Any ideas or support??? heheh. your help is truly appreciated
I feel you pain Brother.......
I don't have a clue how IMEI and towers can just not register your device...though....but anyhow, did you check if you have the Phone in the Dialing screen-Menu-Options, then the tab BAND on the bottom and both of them selected as AUTO? if not, then try changing bands.......
If you know that then, I'm thinking only of AT&T could have blacklisted you or some sort.......but that is highly unlikely......
I had some problem like that when i'm out of the country using Foreign Chips, and it seems the Kaiser needs a bit of time to adjust to new sims, and that can take minutes, hours...or even days......who knows what is happening as the phone is "learning"....... hope this helped you a bit....
I've been using my Kaiser for several months now and I did not register my IMEI, I just popped the sim out of my 8525 and took off running. It sounds to me like your phone has failed in some way, especially if your new sim works fine in another phone. The question now really is, where can you get a Kaiser fixed in the US? I spoke with HTC on another subject and I get the feeling that it may be difficult. I got mine from a shop in Canada, guess I'd have to go thru them.
In any case, good luck, it will be interesting to see what it turns out to be.
I second RemE -- like him, I bought a Tytn II & plugged in the SIM from an older phone (in my case a Qtek 9100 not bought through AT&T/Cingular), and have had no problems.
i had a similar problem with my 8525. I bought a Tilt to replace it, and about a week later I gave the 8525 to my son to use. neither his SIM card or mine would work in the 8525, but they worked in other phones. I brought the phone to the AT&T store and the guy there did something on his computer, then the phone was able to work. I'm not saying that AT&T blacklisted it, because I don't really know. But it took a change by the AT&T rep at the store to get the phone working again.
I have been using Kaiser with ATT for three months now with no problem. I just used the sim card from my Blackberry and so far, no problems.

Sim Card Missing / Fried Sim

Okey so ive had my diamond for 3 weeks and have had this issue. The device worked fine for 2 weeks except for this problem that it keeps dropping the connection and just says "no service" but when i disable and re-enable the phone radio i get full signal. However one time the device froze and i had to soft reset. After which it said the "sim card is missing, you can make emergency calls if your service provider supports it" when the sim card was in the phone. I tried resets and cleaning the sim all to no avail. So after not being able to find anyone else with this problem i figured it must be my old 2g sim that had been causing the problems so i went and purchased a new 3g sim from my service provider (mobilezone [switzerland]) and inserted it into the device. Everything starts working again and i figure the problem is fixed. However the phone continues to drop the signal again and again over the next few days and finally kills the sim card again, and displays the same "sim missing..." error. So i have now taken it back to the retailer and they say there seems to be no issue with the device as the technichen inserts a new sim and everything works fine. The thing is that the sim cards are completely broken. They no longer work in any device!!! But it took 2 weeks the first time and 3 days the second, so the technicians agreed to test the device for a couple days, im just sure its gna work fine for that amount of time but screw up again after when i use it again. Can anyone provide any insight into this? I speculate that its perhaps an issue with my service provider since they do not have their own network but use orange (switzerland) with their custom network settings, and when configuring the device the WM6 connection wizard only has 3 options and my provider is not listed, so i use the orange config settings, which i thought may be slightly different and cause problems. Ideas?!?!?
Thanks in advance.
Sam
Please, distribute some of these across your text: ,,,,,,,,,,,,,,,,,,,,,,¶¶¶¶¶¶¶¶¶¶¶
If it helps, I had to have a new sim to use it in my new phone (not the diamond, a nokia) because it didn't work properly, as it was a relatively old sim.
Hi did you ever get your sim problem sorted, have been experiencing same,
except my sim still work on other phones?

HD7 Invalid SIM

I am working on a friend's HD7 locked to US TMO running stock US TMO Phone 7 ROM. A few days ago it suddenly started getting "Invalid SIM message". It is out of warranty coverage.
Swapping out for a known good TMO SIM it still gets the Invalid SIM message and his SIM works fine in another device so it doesn't appear to be SIM related.
I performed a hard reset on the device but it still gets Invalid SIM so it doesn't appear to be software related.
Suspecting hardware, I did a lot of searching of xda-developers and google for possible solutions.
I found this: http://forum.xda-developers.com/showthread.php?t=1127798 so per that thread I took the device apart and cleaned then reseated the SIM slot connection to the main board. It still gives Invalid SIM error.
I found references elsewhere that it might be due to the SIM being somewhat loose in the SIM slot so I shimmed it with a piece of paper, yet I still get Invalid SIM.
I'm not sure what direction to go from here. Has anyone ran into this and been able to fix it successfully?
A couple hours after posting the above, I noticed that the error message was gone and the device was connected successfully to the TMO network. I have no clue why. Hopefully the issue doesn't happen again.
This exact same issue happened with my T-Mo HD7 too.
I'm in Australia, and bought the phone off eBay brand new with an unlock code. I used to be with three (a dodgy network provider), and got a couple of new sims, with no avail. With a reboot though, the message would be gone.
Since then, I have changed network providers and reset the phone a couple of times, to find that I no longer have the issue at all (knock on wood).
Hope your problem is solved.
Dean
It seems to be. My friend hasn't had the error message since. Still, I wish I had a better grip on what caused it and what fixed it - makes me worry that it will happen again.

[Q] Tablet shuts down when trying to access SIM card

Hi chaps, I have tried searching across the internet with no luck, here's the deal.
I bought this p1000 galaxy tab some days ago from a guy on a forum. tried it thoroughly before paying, inserted my phone SIM, got a phone call, sms, 3G internet, wifi, all working flawless. I used it for some days wi-fi only waiting for my new tablet SIM to be ready.
Monday, I receive the SIM but it still had to be activated. I just kept it in the tablet waiting for it to be OK. Zero problems, just the usual "no service" message like you would expect from a sim that's yet to activate
This morning I finally get the SIM activated, but as soon as I try sending a text or something, the tablet just shuts down. After that, no way trying to boot it up again: it reaches the Samsung logo, then bye bye. If you remove the SIM from the tray it magically comes back to life.
I already tried the usual stuff, like hard resetting and like, cleaning the SIM or something. I also tried with another carrier sim and I get the same behavior. I'm starting to believe that there is some hardware fault with the SIM reader, but I thought I'd try to get some hints from here before calling Sammy's assistance. Also the weirdest part is that it worked some days ago!
If anyone has any idea/experience to share, I'd love to hear from you mates. thanks in advance!
(oh and btw I know how to hit a thanks button)
I'll update the post with further intel, maybe it will help someone down the road.
The tablet does not like freshly activated SIMs. I know it sounds crazy but that's where we are at. We have tried like 4 different SIM cards from different operators, all work flawlessly; The SIM card of the above NOW works flawlessly as well, it just needed a couple days to settle down. I have no idea if this is a software bug, a hardware fault or some strange network settings from my carrier, but the problem seems to be solved for now. Luckily i didn't send it in for repairs!

Droid Turbo on T-Mobile. Need Help!

So I've had my droid turbo for a month now and I've been using it on T-Mobile and it has worked fine, no issues whatsoever, until yesterday when the service just stopped working. I have no signal at all. I took it to T-Mobile and they couldn't fix it and then Verizon who also couldn't fix it. I tried At&t and Verizon sim cards and they work, but for some reason T-Mobile sims don't work anymore, I woke up and it just had no signal. Also, whenever i put in my sim, i get the message "Restricted access changed voice service is blocked" Please help!!
cclancy97 said:
So I've had my droid turbo for a month now and I've been using it on T-Mobile and it has worked fine, no issues whatsoever, until yesterday when the service just stopped working. I have no signal at all. I took it to T-Mobile and they couldn't fix it and then Verizon who also couldn't fix it. I tried At&t and Verizon sim cards and they work, but for some reason T-Mobile sims don't work anymore, I woke up and it just had no signal. Also, whenever i put in my sim, i get the message "Restricted access changed voice service is blocked" Please help!!
Click to expand...
Click to collapse
I've been on T-Mobile with my Turbo for a little over a month now. Delete any APNs if you have any, reboot and test.
If no profit..
Turn wifi, Bluetooth, nfc, anything that connect to any kind of network off and run it dead, then charge it to full and boot back up then turn what you need back on, should have signal again.
If not..
Try another sim from T-Mobile, yours may be damaged if you frequently take the tray out over and over..
The Last possible solution would be to reset the phone entirely, so make backus f what you need beforehand. Then set it up from last backup saved to google if you have one and pop the sim in, let it sit 2-5 mins, reboot, then give it ~2 mins and you should have signal recovered.
If not, then may be an update gone awry or if you have it rooted and such, maybe something you used broke it.
Last problem would be a bad antenna, so try all the above before trying to replace the antenna.
Hope the best of luck for you :
Only Problems I've had on my Turbo was it turning wifi off randomly here and there, making me do a reboot every few days.
Dropped signal once, but that during initial use, so not much to blame on it there
I've been using a Turbo on tMob since 2 wks after release. That said I've run into the same thing a couple times over the past yr. Out of nowhere it just acts up & stops working. As suggested above I'd say about the smae things. So to no repeat it all my first suggestion is try getting a new Sim card from tMob. First time it happened to me it was my sim, other 2 times it was not, sim was good. Only option to fix it on my end was a factory reset of the device. On the resets tho I made sure to use tMob sim, but i also did not start the process until the msg pops up on the turbo saying its " Not a Verizon sim card" i'd clear that and then start the process of resetting it. So far so good as of late, been at least 3-4 months since the last time i was having troubles.

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