@Daniel I connected with Nothing Support team and they asked me to visit nearest service centre. As service is located in another city ,I can’t go there right away so talked with service centre guys over call. They told me that lens would be cleaned after opening back panel and would be reassembled. And will diagnose device further once I visit service centre.
Meanwhile I get to know from past users who faced the same problem that after service centre repair /cleaning their device started getting dust in back panel also which not the case earlier and after sometime of usage dust again started accumulating inside camera lens. Also, some user’s device got scratched in the process.
So, I’m concerned about quality of repair/cleaning and it might ruin the original design & feel of the product or might lead to other issues.
And, what I think is it’s a quality control issue from Nothing. Although it’s IPA 54 rated, still dust is getting inside in just 2- 3 days of usage. It seems like this part was not taken care of during assembly of device and it appears to be a manufacturing defect.
I switched from Google Pixel 3a to Nothing Phone 2a and had used many reputed brands like Samsung, Vivo & Motorola devices in past, but never faced this type of issue even with their lower budget devices.
In my opinion Nothing should provide replacements in such cases where dust is accumulating when device is under 7 day replacement period.