Re: Jolla hardware internals
 

In the doc of ACPM-7251, it talks about GSM/EDGE and UMTS and nothing else, so i think you had made a msitake by writing "LTE(850)"

Re: Jolla hardware internals
 

In datasheet: Band5 – UMTS and BC0 and LTE

Re: Jolla hardware internals
 

I never ever thought of that use case to be honest with you ;-)

Re: Jolla hardware internals
 

Never experienced the SIM disconnect issue and even tried, right now, to press on the SIM card. I think and hope I'm lucky !

Re: Jolla hardware internals
 

Never happened to me.

Just wondering if you guys are using maybe old wore down SIMs? I recall having similar problems once with an another phone. That time just getting a new fresh SIM card solved the problem.


EDIT: the SIM on my Jolla is a new one. Got it just couple days before Jolla and haven't used it any other device.

Re: Jolla hardware internals
 

It isn't too much of an issue for the time being to be honest... I have to press rather hard and in a particular position on TOH to make it happen, so I'm not massively worried. My SIM card is pretty new, has almost exactly 12 months and never ever ever failed me before.

Re: Jolla hardware internals
 

Wasn't able to reproduce the problem with white TOH, even by directly pressing on the SIM.

However after I switched to the limited edition TOH it was actually pretty easy. Good thing I don't like the colour and never use it.

Re: Jolla hardware internals
 

On together.jolla.com there are people saying they have the problem with brand new operator supplied micro SIMs, not cut down old SIMs. The question also has (currently) 54 votes (and just as many comments) suggesting it's not an isolated issue.

I would imagine the solution is to provide a stiffer other half to prevent flexing, or a way to disable the SIM sensor entirely so that when triggered it doesn't disconnect calls or ask for the phone to be rebooted.

Most people will insert the SIM when they get the phone and never remove it until they bin the phone, so offering an option to disable the SIM sensor in Settings would seem a good choice for those experiencing the problem, although it should be fixed in production (better SIM slot?) so that future phones don't have the problem at all.

Re: Jolla hardware internals
 

I've got the problem with the white TOH - haven't installed the limited edition TOH as I prefer the white!

So it sounds like both TOH is likely to cause the problem, white or limited edition, and since your SIM is also new I think we can safely rule out changing the SIM as a likely solution.

Re: Jolla hardware internals
 

Its propably combination of design fault in OH concept, small variation in SIM sizes & age and small quality differences between individual Other Halfs thats causing people to have different experiences relating to this problem.

Already noticed on one Jolla phone review in finnish site, which had reviewer complaining about loosness and creaking of his OH and the disagreeing comments on that review, that there's propably quite a bit of quality variation on Other Halfs.

Re: Jolla hardware internals
 

Temperamental SIM sensing microswitch? Admittedly I've only had about 10 phones since my first one some 20 years ago (including models I tried for a few days and didn't like; I tend to look after my things and use the ones I like for years rather than change them with fashion), but I have NEVER even heard about any such thing. Admittedly most phones need to remove the battery to replace the SIM, so sensing the card is part of the boot sequence, but there was one remarkable exception: Palm Treo 600 with a hotswappable SIM. Served me without a fail for 9 years. Cost new about a half of new Jolla.

Re: Jolla hardware internals
 

No problem here.

I checked that small trigger in my phone, and the sim card is quite far from getting pushed under it. I can't push the sim card down in its holder without fear of breaking the whole device, as so much power would have to be applied. There is maybe one quarter to half a millimeter to go until it would do so.

I'm in for the chance that there is variety in sim cards, or maybe sim trays. Mine sim card just barely fits in the tray, it is that thick.
Also there seems to be a very tiny gap in the card for the trigger to snap in.

Re: Jolla hardware internals
 

That's the thing though, even if there are variances in SIM thickness (and this is probably true) then that should be taken into account as part of the SIM slot design, it's not the fault of the Jolla phone owner if their network supplier issues "too-thin" SIM cards (which work perfectly with Apple, Samsung etc.) - what option does that leave the Jolla owner with? Switch networks and hopefully get a thicker SIM? :)

The fact is the SIM slot should work without fail with every SIM card, thick or thin.

Irrespective of the cause (too thin SIM card, flexing TOH), the slot should just work 100% reliably and we shouldn't be having this discussion. Unfortunately, it doesn't, and we are.

And still no word from Jolla...

Re: Jolla hardware internals
 

Absolutely agree with you Milhouse.

I certainly wasn't trying to shift the blame on people with 'bad' SIM cards. Just trying to figure out why I propably had never even known about the problem without this thread. I'm just one the lucky ones, who thanks to combination of things 'clicking right' doesn't have this problem.

Re: Jolla hardware internals
 

I had years ago problem with SIM-tray on Nokia E65. SIM was too thin (or maybe tray too loose). I put two layers of painte's tape to the back of the SIM. It worked.

Re: Jolla hardware internals
 

No SIM problems here with both TOHs.

Re: Jolla hardware internals
 

hmmm *maybe postponing purchase of Jolla*

Re: Jolla hardware internals
 

I don't have that issue either but I only have the white back side. Instead I've added a piece of paper under the battery because it seems to be an issue with the connection from time to time.

Re: Jolla hardware internals
 

The N9 does this no problem.

In addition, I used the phone yesterday as my main phone, played with it, showed it, no problems with the SIM card. You have to make an effort to lose the connection, at least in my case.

Re: Jolla hardware internals
 

Hi,

Hmm just preordered my Jolla yesterday (uk).

This is slightly concerning as i will be swapping sims between the Jolla and my Nokia 925 (and occasionally my 808)

Is the problem the SIM touching that connector?

Regards

Barry

Re: Jolla hardware internals
 

My phone never had any sim card issues. I even tried pushing TOH hard and I could not loose connection to sim card.

Re: Jolla hardware internals
 

I wouldn't be concerned. I'm swapping things all the time and it's really hard to reproduce.

Re: Jolla hardware internals
 

I'm yet another one who only has sim-problems with Poppy Red ltd ed. TOH only. Seems it really varies.

Re: Jolla hardware internals
 

In my case I lost the connection every time I put the phone in my pocket or simply just pressed on the TOH anywhere at the upper segment of the phone.

Imagine situation where you for example go shopping and after a while notice that the phone has been out of network for an hour or more. That's just unacceptable behaviour and it happened multiple times during a day.

I have been able to reproduce this on my friends Jolla's with different operator SIM cards. As the device itself is not beta version like the Sailfish OS, this kind of malfunction should not be happening.

I hope this can be fixed via SW. If not, it means many phones will have to be either fixed or replaced.

EDIT: This happens with both the white and poppy red TOHs. It got more frequent the more I had used the phone which indicates that the TOH's get more loose over time.

Re: Jolla hardware internals
 

No matter what I do I can't get the SIM to disconnect. Is the gold triangle supposed to be pushed out of the way by the SIM?

Re: Jolla hardware internals
 

Good SIM card position

SIM card tray w/out SIM

Now compare on both pictures the golden triangle positions. The SIM card has to push the microswitch to the left and not over or under the SIM card.

Conclusion: Fix the left side of your SIM with duct tape to make it thicker to move the switch as shown in the first picture.

Cheers,
Nek

edit: fixed link

Re: Jolla hardware internals
 

Link not working. :(

Re: Jolla hardware internals
 

I tried remove my sim, no problem et all, very easy to remove(and it was first time for me), so seems issue is not on all devices? mine is MFG Date 12, 2013

And If its related to redPuppy OTH:

I did not get my Red, just a message "it will come in a few weeks", maybe the reason some of us did not get Red was because they decided to make new OTH:s because of the problems?

Re: Jolla hardware internals
 

Obviously not every device (or SIM combination) has this problem otherwise I'm sure it would have been identified before release.

And as stated previously, there are SIM connection problems when using the White TOH too so it's not just a problem with the limited edition TOH.

Other than that your post was spot on.

Re: Jolla hardware internals
 

I did have an issue with the battery though - the phone got switched off several times in my pocket while I was on the move. I noticed that the pins barely touch the battery connectors and probably get disconnected when the device is twisted a bit. After adding a bit of paper under the battery there are no more problems. However I still wonder why the battery connectors are buried so deep inside the battery...

Re: Jolla hardware internals
 

weren't we told that high specs are less important than hw properly designed when we talked about low specs and high price in one of the threads before it was released? (sim, no proper partitions for flash(so it doesn't have to include blobs) and now battery?)

:/

Re: Jolla hardware internals
 

Well, I'm with you there that using Qualcomm HW is always a bad design choice since they are downright evil on their view of open design and should be boycotted really if there was any justice in the world :D

However, the general build of the device is very good on what I have found, and I have had no issues whatever related to the SIM card, battery or other mechanical aspects of it.

Re: Jolla hardware internals
 

Regarding the apparent SIM issue, and having reported that I could reproduce putting pressure on TOH, where the SIM is, to disconnect it, and to demonstrate other use cases: I've just jumped about 40 times with the phone in my jean's front pocket and no disconnection happened. Don't ask why I jumped, maybe it was only to make this point, maybe not ;-)

TL;DR: my SIM disconnection problem may not be _that_ serious, or at least device/SIM dependent.

Re: Jolla hardware internals
 

My phone speaker stopped working completely after receiving 2 messages in the same time in mitäkuuluu. I'm not sure does it have anything to do with the custom ringtone in /usr/share/sounds/jolla-ringtones/stereo.

Now I can't get it working again, already rebooted many times. Sounds work in general though.

Not sure should I create another thread or does anybody have good hints for the problem?

Re: Jolla hardware internals
 

as i understand SIM problems are random, but again not everyone had problems with pixel syndrome on n950 or broken usb on n900. I'm really scared there as i lost my n900 that way :(

Re: Jolla hardware internals
 

It would be really useful to know if the micro USB socket is mounted with through hole soldered lugs to give it mechanical strength or is it just relying on surface mount soldering to keep it in place.

This was a weakness with the N900 and would necessitate ultra gentle plug/unplugging to minimise any opportunity for damage.

Richard

Re: Jolla hardware internals
 

Is the function of the two hidden pins known?

http://s21.postimg.org/plh1z7m6v/top_a_1.jpg

Re: Jolla hardware internals
 

Little hint:

Take a look at the back side of the frame that was covering the PCB and the pins ;)

Re: Jolla hardware internals
 

There seem to be some microchips under the shield. Only diagnostics?

Re: Jolla hardware internals
 

I have read that the main chipset is qualcomm MSM8930aa.
Is there a datasheet somewhere ?