Swapping Jump Modem SIMs is not the Solution!

We had two situations this week where Jump customers with faulty modems thought it might be a good idea to take the SIM card from their faulty modem and put it in their new replacement modem. This would mean they didn’t have to set up a new Jump account and link their new modem.

My first thought was that these customers might be onto something we hadn’t really considered since the beginning of the Jump programme, so we did a bit more investigation.

First of all we discovered not all Jump modems use the same size SIM card.

The Standard or Mini-SIM (also known as 2FF) measures 25 x 15 x 0.76 mm and is typically used in larger devices. Most portable devices such as today’s smartphones currently use a Micro-SIM measuring 15 x 12 x0.76 mm or a Nano-SIM, measuring 12.3 x 8.3 x 0.76mm. SIM cards are typically provided in sets of three, combining the Standard SIM (Mini-SIM), the Micro-SIM and Nano-SIM into one – it’s called the Triple SIM (or Tri-SIM). Users simply pop out the required size for their device.

We then checked out what size SIM is used in Jump modems and this is what we discovered: B315, Smart and Futura modems use a Micro-SIM, while the B618 uses a Nano-SIM.

Unaware of these differences, our enterprising Jump customer extracted his Nano-SIM from his B618 and inserted it into his new Smart Modem, and yes, you guessed it – the Nano-SIM simply disappeared inside his modem! So he now became the proud owner of a brand new faulty modem!

So that was our first lesson – never inset a Nano-SIM into a device expecting a Micro-SIM.

Undeterred, we followed this up with Skinny Jump specialists in Spark to get their view on this practice of swapping SIMS. They advised us that technically a Jump-provisioned SIM card can be swapped into new hardware (provided of course the SIM cards are the same size). BUT, and there is a big BUT, swapping SIMS might solve one problem but generate another. With a swapped SIM, the details printed on the modem sticker (broadband number and verification code) no longer match the SIM in the modem. So when it comes to reporting a fault and getting support from the Skinny Care Team, this creates huge confusion.

So our second lesson was simply to never swap a SIM.