I got my mother a L535 but it just can't hold on to the mobile operator network whilst other phones on the same network have no issues at all. Tried updating but still nothing. Does anyone have a fix for this?
I've also experienced this with an L535 I used to own.
There are several possibilities which you may consider:
1. The antenna of the L535 isn't as well-designed as the other phones - no fix for that.
2. Check the cellular frequencies your mobile service provider is broadcasting and compare that with the frequencies compatible with your phone. This can be easily found in the Official Microsoft Specifications Page.
3. Check the settings of the phone and make sure that the maximum connection speed is set to 3G.