Today, after being down for a week, Microsoft has started to flight builds yet again. We got an update from build 14915 to 14926 and it contains a number of small improvements. However, out of conscious I’m going to discourage upgrading a Windows 10 Mobile device to this build because there are 2 major issues in here of which I cannot believe they got past testing or could be considered non-impacting allowing it into the Fast Ring.
First of, many people are reporting that the PIN-pad does no longer appear when swiping up your lock screen. The result is that you can no longer enter your phone, leaving you with no option but a hard reset or use the Windows Device Recovery Tool. A possible solution to avoid this issue is to remove your PIN-password before upgrading. However…
…I’m also seeing a lot of reports of people being hit by an even worse issue, including myself. So far, I’ve seen reports about Lumia 435, 640, 640 XL, 735, 830, 929, 930 and 1520 whom can no longer recognize the availability of a SIM-card. You know, that thing that makes your phone a phone. The only solution to this issue appears to be using the Windows Device Recovery Tool and go back.
These 2 issues are rather work-flow-breaking and will be affecting a number of people. According to Microsoft, both issues can be solved by performing a hard reset. However, out of own experience and other reports I can confirm that this is not always the case for the SIM-card issue. This leaves people with that issue where a hard reset does not work only with WDRT, but it isn’t a perfect one at all as the WDRT still installs Windows Phone 8.1 back on all of the mentioned devices, which means you’ll also have to upgrade again to Windows 10 Mobile afterwards. Even for Fast Ring users that are well aware about the dangers of being on the Fast Ring, getting stuck with a phone that can no longer phone is quite unacceptable. Another solution would be to stick to it and wait until the next build comes around.
Anyway, on top of this madness, there are 2 other issues I’m seeing being reported quite often. This includes phones that randomly reboot over and over again and phones that are unable to (automatically) connect to a Wi-Fi network, if they get Wi-Fi enabled at all.
UPDATE: Microsoft has added these 2 issues to their list of “Known issues” and are claiming that a hard reset solves both of them. However, I’ve got to say that out of my own experience and some others reporting the same, at least the SIM-issue isn’t always solved by doing so.