We have been working for a year now on using the Electron commercially. To that end we have developed a lot of software and an appropriate Electron shield.
We were just starting to get the first beta test units out, bought a batch of 4 Electrons and they seem to have a much lower quality SIM holder than the originals we did the development on. We found we could push the SIM in and there was very little resistance to stop it when it hit the end of the holder. At this stage it jammed, the Electron is soldered hard onto the shield and the cards are almost impossible to extract. Only way is to push them right through, This creates some more damage to the holder.
- The holder is not up to standard for a commercial product. It is too light, the strap across the centre to hold the card is not substantial and any small bending of the card will result in it losing contact. There is very little travel in the contacts. The plastic frame is too light, too low at the stop end, a card can easily be pushed over it. While not a big issue on a breadboard, once the Electron is soldered down it it a real problem.If this unit is going to be commercial it has to have an upgrade of the quality of the holder.
- The position of the holder could not be a worse one for inserting/removing SIMS. It should not be hidden under the board. Also it should be a push/push holder, trying to grab the card with tweezers to extract it is a nightmare. We will initially provide a partial solution by creating a hole in the pcb under the SIM so that it can be levered out with a small pick.
Questions. We did not have this quality issue with the first units we used, the holder seemed more substantial, at least we did not find cards pushing past the end stops. Unfortunately all these initial units are soldered to mother boards so I can’t see what the holder was made of. Has there been a change in the holder for recent manufacture and has the issue been realised and corrected? Are there plans for a redesign which will put the holder in a more accessible place, ie on top of the board?