1. 2015 is going to be a great year for Android! Why wait??
    Samsung Galaxy Note 5 | Samsung Galaxy S6 | HTC One M9
  2. New Forum Created: Samsung Gear VR!

"No Service" after sleepSupport


  1. luciftian

    luciftian New Member

    Hi, I have just purchased a second hand S4 and I am experiencing a strange issue with it (phone details are specified in my profile):

    - the phone connects to the phone network correctly as soon as it is switched on
    - as the phone goes to sleep, once it is awoken (9 times out of 10), the phone shows "no service" and I need to make my way to the settings to reconnect in order to make any calls (normally just accessing/changing the network mode does the trick, however sometimes the phone re-establishes connection just by going into the network menu itself!).
    HOWEVER, whilst showing "no service", the phone is able to receive calls.

    The phone is not rooted.

    Can anybody help?

    Many thanks

    Flora

    Advertisement
    :
  2. ironass

    ironass Well-Known Member

    Hello and welcome to Android Forums luciftian! :)

    It is always difficult with pre-owned phones to know their history. Are they running their original firmware or have they been rooted and modded in the past.

    I see from your version details that the phone is currently running the latest, "Three", UK network firmware, H3G, with modem NC5...

    Model: GT-I9505
    Model name: GALAXY S4 LTE
    Country: United Kingdom (H3G)
    Version: Android 4.4.2
    Changelist: 481100
    Build date: Mon, 10 Mar 2014 11:30:43 +0000
    Product Code: H3G
    PDA: I9505XXUFNC5
    CSC: I9505H3GFNE1
    MODEM: I9505XXUFNC5


    In the first instance, I would suggest that you check that your APN settings are correct for EE, (Everything Everywhere = Orange+T-Mobile, UK). You should be able to contact EE and get them to forward these settings directly to your phone.

    Failing that, you could download and flash the latest stock Samsung firmware for EE by following the instructions in #1.5 of 28 Galaxy S4 models - know yours? However, doing so, will prevent you from receiving the Three UK firmware updates in future and you will need to flash the EE updates via Odin.

    This is the latest stock Samsung, EE, firmware...

    Model: GT-I9505
    Model name: GALAXY S4 LTE
    Country: United Kingdom (EE)
    Version: Android 4.4.2
    Changelist: 481100
    Build date: Fri, 07 Mar 2014 15:34:05 +0000
    Product Code: EVR
    PDA: I9505XXUFNC4
    CSC: I9505EVRFND1
    MODEM: I9505XXUFNC4
  3. luciftian

    luciftian New Member

    Hello Ironass and thank you for your reply.

    I have tried your first suggestion and nothing has changed: I was always able to connect to the data network and still am with the new settings.

    The fault is with the actual voice/phone connection: I do get connection but after sleep the phone no longer has connection to make phone calls (the phone still receives them).

    I have downloaded the tools to flash the firmware to the latest EE version (to replace the latest firmware for 3G) but I have not done this yet as I need to ensure that this procedure is reversible (i.e. can I hard reset the phone back to original 3G settings, as I might night to return it to the seller if the EE firmware does not fix the fault). Can you please confirm if this procedure is in fact reversible?

    Many thanks
  4. ironass

    ironass Well-Known Member

    You cannot Factory Reset to a previous firmware. You will need to re-flash the H3G firmware in my previous post, via Odin to revert from the latest EE mentioned.
  5. luciftian

    luciftian New Member

    Hi, thank you for confirming that - it is what I thought.
    As I have never done this before, I am a little unsure about attempting it as I fear that something could go wrong with the phone (although my background is IT).

    Is the flashing process fairly safe?

    Thank you for all your help
  6. ironass

    ironass Well-Known Member

    Providing that you have got the correct firmware for your model/variant of phone and you have Samsung Kies PC suite installed but not running, for the drivers then IMHO, this is a safer method of updating your phone than using OTA or Kies. As always, I recommend backing up as much as possible beforehand.
  7. tomblenko

    tomblenko New Member

    AP-I9505XXXUFNC4
    CP-I9505XXUAMDE
    CSC-I9505EVRFND1

    the phone been rooted no signal when sleep mode comes on want it un rooting but cant find matching firmware iv got odin already to un root just need stock firmware HELP PLZ
  8. tomblenko

    tomblenko New Member


    i have a 2nd hand galaxy s4 gt-i9505 LTE i think originally on ee but unlocked to o2 but i have giff gaff sim in it but keeps loosing signal did some checks looks like its rooted i just want it back to normal to see if that works but cant find stock firmware as im a big noob at all things root.
    AP-I9505XXUFNC4
    CP-I9505XXUAMDE
    CSC-I9505EVERFND1

    I DONT HAVE A CLUE WAT THESE MEAN BUT BEEN TRYING TO MACH A FIRMWARE TO THEM TO DOWNLOAD TO UN ROOT AND COMPLEATLY WIPE MY PHONE HOPING THE SIGNAL PROBLEM WILL FIX PLZ HELP THANK
Loading...

Share This Page