I just got off the phone trying to troubleshoot voice dropouts on my Galaxy Nexus CDMA and the Verizon rep told me that on a device with a sim card such as the Galaxy Nexus that you should never dial *228. Is this true? Just curious as to why.
that's correct
the SIM is the authorization to the network and automatically updates the PRL to the phone.
Zepius said:
that's correct
the SIM is the authorization to the network and automatically updates the PRL to the phone.
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Technically, the PRL is on the SIM (it's call the MNC list on GSM-based systems like LTE) so doing a *228 will overwrite the GSM MNC list on the SIM with a CDMA PRL. Fortunately, MNCL and PRL are pretty much the same thing, so the phone will still work, but overwritting the MNCL will apparently cause some kind of problem down the line, which is why they disable you from dialing it directly.
Yeah, I just had to call them about this yesterday because I just got my wife a Rezound and we live in an "Extended Network" area where we connect to Bluegrass Cellular towers. She has no data connection out there and I wanted to see if they could update the PRL somehow while we were outside of the Verizon network, but they couldn't help me out. She told me to take the phone to a Verizon coverage area (30 mins away for me ), pull the battery, pull the SIM card, re-insert the SIM card, then re-insert the battery and boot the phone back up. That's the only way she said you can force a PRL update. I asked about *228 and she explicitly told me to not dial that as it could mess up the SIM card.
Doesn't make sense to me because if the battery is pulled out, how would the phone know that the SIM card was pulled out and/or inserted? How would that trigger a PRL update as opposed to just doing a battery pull and rebooting the phone without touching the SIM card?
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i have the gt-i9250 and i always used an at&t sim with it with out an issue, recently i wanted to switch to t-mobile (thinking the phone should be unlocked considering it was an international phone and was the yakjuxw than i flashed it to yakju which was wierd cause i had google wallet on it and it was working fine although i only thought it was compatible with takju, but anyway all and all i put it to the usa firmware of takju 4.0.4 not going to jellybean yet, but my issue is that i am not able to use the t-mobile sim card in it and i get this (look at screenshot where signal is) what does this mean and how come i cant get signal, when i go to settings and mobile networks it shows me the apn for t-mobile us but not selected so i select it than after i go to mobile networks and it shows t-mobile and at&t and when i click any of them they tell me its unable to connect and it cant connect to the network at this time, so what would this mean and how would i fix it so that i can use it with my t-mobile sim card, also i flashed the newer NA radio uglc1.
That is weird. It should work on either of them. It just means you have no signal. That is strange. You could've actually just popped the Sim right in. It didn't matter if you were using a ROM
Sent from my Galaxy Nexus using xda app-developers app
Is the SIM activated for sure? I know when I switched to the T-mobile $30 plan it took it a good 15 minutes or so to activate, and then I didn't actually get signal until rebooting the phone for whatever reason.
Did you reboot your phone?
Although you can sometimes hot plug a sim card by turning on flight mode, taking the sim card out and toggling flight mode a few times, it won't work sometimes.
probably your cell imei not free and therefore can not change your sim.
There is an application called "****docomo" worth to release the imei. Make a backup just in case
https://www.dropbox.com/s/mcg9gtn1ei85357/FuxkDocomoV3.1.apk
yosula said:
probably your cell imei not free and therefore can not change your sim.
There is an application called "****docomo" worth to release the imei. Make a backup just in case
https://www.dropbox.com/s/mcg9gtn1ei85357/FuxkDocomoV3.1.apk
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Don't think he has a SIM unlock problem. Considering that it was working with AT&T, which never had a locked version of the GNex, I think he's having another issue.
I'd tell the OP to make 100% sure that his new T-Mobile SIM is activated and not defective, then try a few reboots and swaps back to the old SIM and do some troubleshooting. If it's the phone and not the SIM, its likely a mobile network registration error or an APN issue.
Looking in the notification bar, it seems like the phone doesn't think there's even a SIM inserted. Make sure you didn't damage a pin in the SIM tray, and that the SIM is properly inserted and clean. I don't think you'd get this error of "no SIM" if your phone was locked. If that was the case, the phone would recognize the SIM and prompt for an unlock code, which you're not getting.
I rooted my Spring Samsung Galaxy S6 (SM-G920P) running Android 6.0.1 and I unlocked it. I want to use it in my local CDMA network, but when my phone company activated it along with 3G strangely I have signal (i.e. can make calls or send SMS messages), but my 3G does not really work. 3G only comes up for a few moments (as seen at the top bar) when Hands Free Activation (HFA) is trying to work (it eventually fails), or if I go to "Activate Device" in my setup it comes on for a little while too and then goes back off. If I disable HFA then 3G never comes on at all. Why can't I disable HFA and keep 3G connected?
Also, if I take out the Spring SIM (which is useless here since we do not have Sprint here), it tells me I should insert a SIM. Why is it requiring a SIM if I have my preferred network set to: CDMA?
I am really bummed about this after all I have been through, there must be some way to have it not require a SIM and not require activation for 3G?
You need the proper apn setup for your carrier. You should also get a sim card from your carrier, if they use them. If not, try taking out the sprint sim and doing the uicc unlock.
Sent from my SM-G920P using Tapatalk
Let me first start out by saying that I know people have been saying to never do *228 on LTE or phones with SIMs. I was doing it for years on my Gnex and never had a problem, it even updated the PRL in some cases.
Recently I was in a rural area with my 5X and it was bouncing between 3G and LTE a lot, I figured why not perform an update just in case. My phone was served 53977 and been stuck on 3G ever since. I tried taking the SIM out and rebooting many times. It just won't serve me the other PRL for LTE.
Wife's identical phone has 15457. Is there a way for me to download the PRL off her phone and serve it to mine manually?
I'm on CM13.0 - 20160610 Nightly. I think I'm on the latest baseband M8994F-2.6.32.1.1 and vendor. TWRP recovery.
Did a factory reset...flashed factory image. It is stuck in LTE now. Under "Service state" Voice: Out of service / Data: In service
I can't make calls. Nobody knows where to find the PRL file?
have you tried just calling Verizon Wireless and explaining your problem of not being able to make calls? They can probably remotely re-provision your phone.
I try to do as much as possible on my own, since I still have unlimited data I don't like to call VZW for anything. I think you're right I may have to do that at this point.
The PRL is the preferred roaming list, I don't believe it has anything to do with native coverage on Verizon, only updated roaming partners and towers.
You should not have to update the PRL on the 5x. Do a factory reset, and have Verizon activate a new Nano Sim for you. Just put the sim in and you're good to go. No need to mess with any APN settings either.
Is there a way to update my phone [PRL] or similar to help give it the most signal as possible in new locations? I do not have a setting in the menu for updating PRL, and if there is a *xxx or ##xxx# number to dial i have yet to get it correct. Thank you.
4G LTE phones do not have * codes to update PRL. If the SIM doesn't update, try turning off the phone, remove the sim and then turn on the phone without the SIM and it should update the PRL. After the PRL is updated, turn it off and put your SIM back in.
Thank you Almighty1 That is what i had originally done and it appears to have helped pull in better signal at my work. The best i can expect in the Steel building and that area. I get service where no one else does. Even some people on actual Verizon plan phones.
What's the current version of PRL? I see 15478, using a TotalWireless sim card.
The current version of the PRL only matters if it is for the carrier you are using since if you use a PRL for a different carrier, it might explain why you might not get the best reception as the towers may be rejecting you since you have a different carrier. Mines shows 15480 but I don't know when the last time it was updated as my phone is on 24/7/365.
Thanks, just wanted to make sure my PRL file is not grossly outdated.
So I have the Galaxy S9 plus, sprint edition. I flashed it with the U1 firmware. Then paid to have it network unlocked. It was reading every SIM card, but sprint & boost (bcuz to get are n not compatible with the unlocked SO/S9+.
So, I decided to switch to either Verizon or AT&T. Verizon won it due to the year long Subscription. Anyway before I went to Verizon. Every SIM card I placed in the card worked no problem. Well, Verizon activated the phone told me the steps to do. I powered off the device. Like I was told & placed the new sim card in.
When I booted up my device it, rebooted with the "New Network provider Sim inserted" & did so. It came on with service. Then rebooted again & came back on with service... Yet again. Then out of nowhere it rebooted, but this time it came on with it any signal bars. Saying, the folowing messages "Searching For Service", "No Network Connection" and "Emergency Calls Only".
I have did all the trouble shooting that I have came across. Including using the Chimera Tool to try & fix the network connection. But it repeatedly failed. I took it to UbreakIFix & they said the phone's fine. That it has to be Verizon's side with the problem. Can anyone help me fix this issue.
I have placed other Sim cards into the device & they work but not one Verizon Sim will.
CharmedWhovian said:
So I have the Galaxy S9 plus, sprint edition. I flashed it with the U1 firmware. Then paid to have it network unlocked. It was reading every SIM card, but sprint & boost (bcuz to get are n not compatible with the unlocked SO/S9+.
So, I decided to switch to either Verizon or AT&T. Verizon won it due to the year long Subscription. Anyway before I went to Verizon. Every SIM card I placed in the card worked no problem. Well, Verizon activated the phone told me the steps to do. I powered off the device. Like I was told & placed the new sim card in.
When I booted up my device it, rebooted with the "New Network provider Sim inserted" & did so. It came on with service. Then rebooted again & came back on with service... Yet again. Then out of nowhere it rebooted, but this time it came on with it any signal bars. Saying, the folowing messages "Searching For Service", "No Network Connection" and "Emergency Calls Only".
I have did all the trouble shooting that I have came across. Including using the Chimera Tool to try & fix the network connection. But it repeatedly failed. I took it to UbreakIFix & they said the phone's fine. That it has to be Verizon's side with the problem. Can anyone help me fix this issue.
I have placed other Sim cards into the device & they work but not one Verizon Sim will.
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some steps would include making sure its switched to global mode in network settings and setting up the apn