Hi,
I purchased a Chinese Android mobile which has the MTK6573 chipset. It is called a Star A3.
Love the phone however I regularly see the alert/error "Restricted access changed" in the status bar and the signal drops off both SIMS. If I pull down the status bar and check details it says "Voice call service blocked".
What is interesting is that it is always the Vodafone NZ SIM card even if I swap cards between SIM slots. Other SIM is 2Degrees.
I've searched the internet but there seems very little info on this subject other than to say that some HD9 users have had the same issue and have Spice Mi 350n users.
Some suggest it could be a IMEI issue but I'm not so sure.
Does anyone have any ideas?
Can provide more info on request.
Thanks in advance.
*** Additional info... I've turned off my SIM data connection which was linked to my 2Degrees SIM and now both SIMS manifest the same error. If I re-enable data on the 2Degrees SIM only the Vodafone SIM gives the error ***
I have the same issue on an IHTC HD2 bought on fastcards with the same chinese android. I don t know what the problem is. Everytime I turn the phone on there is available network, but after 5sec it gets blocked for good. I only have one SIM card and data connection doesn't work. This is freaking annoying ...
Thanks for the attention
Sounds like a slightly different issue than the one I have as my phone will reconnect and I can use it but it frequently drops off.
Perhaps turn your phone on without the SIM card in it and get your IMEI numbers.
You can google websites to check your IMEI numbers are valid. Perhaps they are not valid and your carrier blocks the phone?
Please use the Q&A Forum for questions Thanks
Moving to Q&A
Have found one other thing...
If you go into mobile network settings and change the network mode from say Auto to WCDMA only or GSM only you receive the "Restricted access changed" error notification immediately so I'm guessing it is related somehow?
It would appear the "Restricted access changed" notification appears whenever the network mode is changed from 2G to 3G either automatically or manually.
Images attached.
Occam's Razor strikes again
I had this same problem with an unlocked phone on AT&T network. Seemed to happen totally at random. It was driving me nuts, and nobody from AT&T could figure it out.
It occurred to me that the problem might be physical when the phone failed to recognize the SIM at all one time. Seems to be that the SIM card wasn't making good contact with the socket. I put a few pieces of scotch tape on the SIM card so that it fit a lot tighter and made really good contact, and I haven't had a single problem since.
(I don't know enough about it to explain why this worked for me, but I theorize that a loose or weak connection somehow fails out and introduces some kind of garbage data that the phone and/or network doesn't like, and it gets blocked as a result.)
Thanks for the post.
The problem is that between me and my friends there are about 5 of the exact same model all doing the exact same thing.
And ALWAYS when you go into network settings and change from say AUTO (WDSA/GSM) TO GSM ONLY.
Cheers
I'm curious to know if taping the SIM card so it makes better contact solves the problem for you. Does this problem happen with different SIM cards of different brands and networks or do you and all your friends have the same?
Hi again, tapping the SIM card does not appear to make any difference. I've also tried thickening the SIM card by sticking a layer of tape to it.
Seems to happen in low reception areas where the phone may lose signal and then reconnect to the network... I guess similar to how it is replicated by changing network mode.
Can you repliacate it on your phone by change the network mode? e.g. auto wcdma/gsm to gsm only
Hi i had the same version Star A3 iam frome Egypt and had the same problem i tried to put different sims from different agents but the same problem any person can tell me how to connect my android mobile with pc or from where can i get its driver
Thank you
Dr.Ahmed Hassan
I just changed my htc desire to a one S. Same Sim. It keeps popping up 'preparing sim' and 'restricted access changed'. Never did this in the desire. Only the handset has changed. It's not a poorly fitting sim. You can shake, bash, etc. no effect. It'll happen quite often. Could certainly be as others state when switching from 3g to gsm etc.
It seems I spoke too soon. My phone (Blu Studio 5.3) started doing it again. I can produce the "restricted access changed" message by switching from WCDMA/GSM Auto to GSM or WCDMA only and from WCDMA to GSM or vice versa. It's something with the switchover.
I have noticed that I get Restriction Access Changed message only when 3G is turned on. I turn 3G off and the phone does not lose the network any more. Yet to figure out why it happens...
This started happening to me today and like the post above mine only after switching 3G off does the restriction go away. This is annoying but I'm about to reinstall my rom and see if that helps.
Just had the same problem on my SGS3. Only thing that fixed it was a powerdown and a battery pull. Hope it doesn't happen again.
Same problem
I have tried putting in 2 different sims. i bought a fake iphone 5 from china. it is saying no service: restricted access changed. Please help!!!
I'm getting this today with a Nexus 4 running on O2 UK. I've never seen it before on any phone and have been on O2 for years.
I sometimes can't dial out and calls in are going to answer phone. Also, texts are not getting through.
Airplane mode off/on seems to work.
The weather is appalling here today (Snow) I wonder if it is to blame.
I have contacted O2 and spoke to a guy (who knew a lot less that I did about the device/network). Anyway, a new SIM is being sent out. We'll see.
---------- Post added at 03:16 PM ---------- Previous post was at 03:06 PM ----------
Update. My wife's phone also not working (O2) although she is not getting the "Restricted access changed..." error in her notification tray.
I can confirm this is happened on my Nexus 4 also. cell reception disappears for a moment then comes back. after that all seems to be working as normal and hasn't caused any problems with me, except for the mystery and intrigue. does anyone know what causes it? I receive the notification "restricted access changed" and then when i pull down the notification bar to look at the notification, the notification is GONE ! it does not stay in there.
I'm definitely putting my Nexus 4 issue with this down to the heavy snow that day. It hasn't happened since.
New Nexus 4 here with t-mobile prepaid. Had it happen last night when I got home for the first time. It was showing 2 notifications, one for voice and one for data. When you click them, they go away. Saw them appear a couple more time through the night and this morning they were also showing.
No snow here though...
Having a problem here. i don't know if its the phone or the network. Im using C6833. I just changed my sim card for a GLOBE LTE sim (Philippine) ., but upon switching on LTE/WCDMA/GSM it will scan network but after 5 mins it will lost its connection and will not scan any network again.. but in a settings of WCDMA/GSM my network run smoothly., can you figure out what is the problem? thanks for your help.,
Sorry for reviving ths post, but I have a problem close to what OP has...
When I click LTE/WCDMA/GSM. It cannot detect any 4G signal, goes to 3G. Then, the option reverts back to WCDMA/GSM.
I tried the SIM card on another phone, and it can detect 4G signal.
Would appreciate any help.
HI, I am a lucky (for now) owner of OPX.
I have problem with network switching. Iam living in small village and i have to use network roaming (yes, i can use others providers network as well for free - in my country).
I'am in P4 network(base/mother network), but in my village there is no good signal for this network - so, i just using another one - usually PTC 3G because this network has best signal in my area.
I have few android phones in the same network (P4) and when i select network, phones do not switch to any other network - even if there is no signal of this network (Nexus4, Nexus5, Sony Xperia Z and CAT S40).
With OPX its different, and very problematic. When i switch to PTC network, it works and not switch to any other network until i left the phone and let it for sleep... (5-10 min) then network switch to the base network P4 and ussually there is no signal in this network, and i have to wait until i can make a call or send SMS message. I dont have the problem with any other phone. I see, that the problem intensifies in specifed room, where is Wifi(dualband) router - but not only. I suppose, its software problem.
EDIT: Switching to P4 network happens when phone screen is off and phone is in idle, after turn on the screen and waiting few seconds, phone ussualy connecting to PTC netwok with good signal.
Screen with bad signal: 1drv.ms/1JmvSU1
EDIT2: I found another freaky thing, after while of phone IDLE, iam turning on screen, and there is full P4 signal, after 1-3sec freeze (yes, freeze, laag) signal agin is 0 and i can enter phone PIN code to unlock.
And there is my question, how to make this works well ? Is there any way to force select only one network ? (i dont need switchning). Maybe can i do this with root privilieges ? I hope, you can help me guys.
Screenshots:
1drv.ms/1MpPiY0
1drv.ms/1ZeE55R
Cheers
HI, I am a lucky (for now) owner of OPX.
I have problem with network switching. Iam living in small village and i have to use network roaming (yes, i can use others providers network as well for free - in my country).
I'am in P4 network(base/mother network), but in my village there is no good signal for this network - so, i just using another one - usually PTC 3G because this network has best signal in my area.
I have few android phones in the same network (P4) and when i select network, phones do not switch to any other network - even if there is no signal of this network (Nexus4, Nexus5, Sony Xperia Z and CAT S40).
With OPX its different, and very problematic. When i switch to PTC network, it works and not switch to any other network until i left the phone and let it for sleep... (5-10 min) then network switch to the base network P4 and ussually there is no signal in this network, and i have to wait until i can make a call or send SMS message. I dont have the problem with any other phone. I see, that the problem intensifies in specifed room, where is Wifi(dualband) router - but not only. I suppose, its software problem.
EDIT: Switching to P4 network happens when phone screen is off and phone is in idle, after turn on the screen and waiting few seconds, phone ussualy connecting to PTC netwok with good signal.
Screen with bad signal: 1drv.ms/1JmvSU1
EDIT2: I found another freaky thing, after while of phone IDLE, iam turning on screen, and there is full P4 signal, after 1-3sec freeze (yes, freeze, laag) signal agin is 0 and i can enter phone PIN code to unlock.
And there is my question, how to make this works well ? Is there any way to force select only one network ? (i dont need switchning). Maybe can i do this with root privilieges ? I hope, you can help me guys.
Screenshots:
1drv.ms/1MpPiY0
1drv.ms/1ZeE55R
I'm using a Samsung Galaxy S9+ for a couple of weeks now and noticed a strange issue.
Whenever I'm connected to my service providers 4G LTE network and use mobile data, I can see mobile data along with the mobile network get disconnected and reconnect quite frequently. As in, I can see the mobile signal indicator turn to no signal and then back on again.
It seems to occur when there is a burst of data communicating through the connection. i.e. start of a Youtube video playback, doing a speed test etc. It's quite frequent and annoying.
So far I've tried the following to no avail:
- Network reset
- Using a different SIM card
- Booting the phone in safe mode
Pretty sure it's not a network provider issue because my wife uses the exact same phone with exact same firmware and hers does not have this symptom.
Any help is appreciated.
P.S. - I have not seen the issue when connected to WiFi on the HSPA+ network of the provider. Seems to occur only on 4G LTE.
I tried the following additional scenario:
I put two sims;
SIM 1 for calls and text on 3G/2G auto connect
SIM2 for data on LTE/3G/2G auto connect mode.
SIM2 connects to 4G. Whenever there is a sudden burst of data on it, mobile networks on both SIMS disconnect and reconnect.