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jairolevi
Town Hero / Héro de la Ville

Constantly Dropping Signal - Dual SIM phone - OnePlus X

Hello Guys, 

 

I just noticed this happening to me during the weekend.  It happened several times on Saturday and Sunday.  My Public Mobile SIM would just drop the signal!  ( My Speakout SIM is fine )

 

Dropped Signal.png

 

 

What I have tried that doesn't work:

 

  • Turning "Airplane Mode" on and off.  Speakout Reconects.  Public Mobile stays without service.
  • Since my phone is dual sim, I turned off the PM SIM and back on , no go.
  • Rebooted the phone, no go.

 

What seems to work:

 

  • Switching data Services to my Speakout SIM and then back to Public Mobile.
  • Rebooting the phone does not work, but turning it completelly off and then back on works.

 

What I have tried to resolve the problem:

 

  • Made sure the APN Settings is correct:  sp.mb.com
  • Preferred Network mode: LTE
  • Re Scanned Network Operator and selected Choose Automatically.  It chose: TELUS 4G (PM does not appear in the list)
  • I have done a phone factory reset! ( what a pain ).

 

 

Sadly the issue keeps happening.

 

I have noticed that this happens more often when I am on the move, it seems to me that when the cellphone tries to connect to another tower it can't.  It is not a coverage issue since I do have a work phone in the TELUS network and it does work flawlessly.

 

Here are some screenshots:

 

APN.pngNetworks.pngSignal Strenght.png

 

Signal strenght shows 0dBm.  But if I turn off my phone and back on then its fine.  Also my Telus phone is fine.  Its like the SIM is not registering in the network.

 

Any ideas guys??

Thank you,

 

JL

 


Accepted Solutions
imm1304
Retired Oracle / Oracle Retraité

Re: Constantly Dropping Signal

Eventhough you do not have data on Speakout, I did notice in your screenshots that Speakout is connected to a 3G network.  This leaves only a 2G slot open for PM to connect to.  As we all know, PM doesn't have a 2G network.  Hence the "Emergency Only.." message.  

 

Try and force Speakout down to 2G by letting PM sim connect first.  

View solution in original post


All Replies
7789849803
Mayor / Maire

Re: Constantly Dropping Signal

@jairolevi I would try the following two things:

 

(1) Try putting your PM SIM in another phone (possibly your work phone) to see if it'll get coverage. This will help determine if it is a phone or a PM issue.

 

(2) Assuming this turns out to be a device issue, and not a PM service issue, try swapping the Speakout and the PM SIM cards. Just in case there's something in the SIM slot possibly causing the issue.

imm1304
Retired Oracle / Oracle Retraité

Re: Constantly Dropping Signal

Hi @jairolevi!

 

A simple suggestion just in case you have not tried it yet:  switch the sim cards.  Move PM to sim 1 and Speakout to sim 2.

 

Edit:  which phone is this?  There may be phone hardware and/or firmware specific fixes to search for in places like the xda developers forum.  

7789849803
Mayor / Maire

Re: Constantly Dropping Signal

@imm1304 It's a Oneplus X.

jairolevi
Town Hero / Héro de la Ville

Re: Constantly Dropping Signal

Good Idea, I'll switch them and see how it goes...

 

I'll let you know,

 

Funny thing is that this never happened before with my Tbay SIM or my Speakout, that is why I am inclined to think its a registration issue instead of a phone/hardware issue.

 

Jairo.

imm1304
Retired Oracle / Oracle Retraité

Re: Constantly Dropping Signal

Looks like its unfortunately bothering a lot of people as this discussion on their website suggests:  https://forums.oneplus.net/threads/oneplus-2-losing-data-connection-getting-exclamation-mark-but-onl...

 

Post 11, someone fixed it by replacing the sim card.  Post number 23, someone went to the APN settings and reset to default and that resolved it.  But overall, there isn't any conclusive fix.  

jairolevi
Town Hero / Héro de la Ville

Re: Constantly Dropping Signal

I saw that one too.

 

That is why I did a factory reset on my phone, someone fixed it like that.

 

The weird part is that this does not happen with my Speakout or Tbay sims, it only happens with my PM Sim.

 

JL

 

 

jairolevi
Town Hero / Héro de la Ville

Re: Constantly Dropping Signal

Funny thing..

 

I swapped the sims, PM would NOT register even after a reboot, complete shutdown and power up, reset APN Settings, re scanned networks... nothing.  All I would get is this...

 

Screenshot_2016-04-19-10-47-11.png

 

 

To make register I had to switch data from PM to Speakout and then switch it back to PM.

 

Have you seen this kind of stubborness happen in a PM SIM ?  Would this be a SIM issue?

Thank you,

 

JL.

imm1304
Retired Oracle / Oracle Retraité

Re: Constantly Dropping Signal

So.  I got curious and did some more reading into this.  

 

My understanding is that this dual sim has limitations.  If one sim is connected to 3G/4G then the other sim can only connect to 2G.  Try and work within this limitation and see if this resolves your problem.  

 

In your scenario, you should disable speakout sim, connect PM sim to LTE then enable the speakout sim.  I assume that speakout does have a 2G network connectivity because its on Rogers GSM.  

jairolevi
Town Hero / Héro de la Ville

Re: Constantly Dropping Signal

Hello @imm1304

 

I do not have data on my Speakout SIM so this shouldn't apply, am I getting it right?

Thank you,


JL


@imm1304 wrote:

So.  I got curious and did some more reading into this.  

 

My understanding is that this dual sim has limitations.  If one sim is connected to 3G/4G then the other sim can only connect to 2G.  Try and work within this limitation and see if this resolves your problem.  

 

In your scenario, you should disable speakout sim, connect PM sim to LTE then enable the speakout sim.  I assume that speakout does have a 2G network connectivity because its on Rogers GSM.  


 

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