Hi Mychaela,
On Fri, Jul 21, 2017 at 02:47:16PM -0800, Mychaela Falconia wrote:
In the case of sysmo(U)SIM cards, it looks like 2FF-only cards are no longer available,
Yes, we had sysmoSIM-GR1 in 2FF-only form factor very early on (> 5 years ago), but the specific chip/OS was not satisfactory (GRcard), and most people were asking about smaller form-factors
and the current choices are 2FF+3FF or 2FF+4FF. My question is: if I only want 2FF and have no interest in 3FF or 4FF, which variant should I buy? In other words, which variant is mechanically stronger and less likely to break in 2FF-only usage in various kinds in 2FF sockets?
I would recommend the 2FF+3FF. You could put some strong, thin adhesive tape (like kapton used in electronics rework) on the back to avoid the frame and the 3FF part from separating.