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.

-- 
- Harald Welte <[email protected]>           http://laforge.gnumonks.org/
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"Privacy in residential applications is a desirable marketing option."
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