Just a quick report on the newly arrived
Huawei B315s-22 4G LTE/WiFi
With the Sosh card I was delighted to be able to get a reasonable 4G signal at the house (for SFR on the existing router it's installed up in a barn attic at some distance from the house, as the SFR signal here is weaker than that of Orange/Sosh). The Huawei doesn't come with external aerials so that was a pleasant surprise.
The phone (which you plug in via an RJ11 and allows you to use the SIM card for telephoning) works faultlessly, and in fact when you pick up the phone there's even conventional French dialling tone there. Our cordless phones work fine on it.
The PIN management is different to the TP link modem, in that the Huawei encourages you (defaults in fact) to switching the SIM card PIN off (or de-activating it). The SOSH card - taken out of the Huawei and put back in a phone) is now behaving erratically in our Nokia 2G mobile phone, although it hooks up with the Orange network it rarely allows one to make a call, one dials, waits, and then there are three little pips and the phone drops back to idle.
So I reactivated the PIN system for the Sosh card, but still have an unreliable performance in the Nokia. However, in an even older Nokia there appears to be no problem, it's as though one Nokia has taken agin the SOSH card since it's been in the Huawei.
Turning to SFR, I tried that in the Huawei. In spite of the router's unfavourable situation in the house as far as SFR coverage is concerned, it does produce a weak but stable 4G signal, albeit running at only 8 Mbps. However, the phone part simply refuses to work, I cannot make calls via the Huawei whilst the SFR card is there.
So a mixed report, and certainly given the problems that MAY have been engendered on the SOSH card, and the fact the phone bit doesn't work with SFR, I have to say that maybe this isn't the box for use in France..... However, in our case the SOSH/Huawei combination works so we now have TWO relatively fast 4G internet signals simultaneously in the house, and if someone rings us we don't have to hunt for the mobile.
And @ johnnyboy, the fact that SFR phoning doesn't work on a Huawei does make me wonder whether your problem IS one simply of incompatibility.