Question about Sony Ericsson Z300a Cellular Phone

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Sleep problem: phone gets inactive

I've had this problem ever since i got this phone: people are calling me when my phone is on and the calls go straight to the answering service. Also, SMS may arrive from few minutes to several hours late. Only thing i can do is to keep switching the phone off and back on, apparently only then the calls come through as they should do and SMSs arrive in real time. But again, after X hours the phone switches into that annoying lazy mode. If i switch the sim card to another (older) phone, everything works smoothly. Also, I just got this phone from repair yesterday, basically the guarantee repair guys had just resetted the phone, re-installed and updated the software and claimed everything is now fine. And just this morning i missed an important work phone call since the call went straight to the answer, and i did not get the notification in SMS in time. does this sound familiar to anyone?

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If the same SIM card works well in another phone ie. your calls come through OK, then the problem must be with the actual phone set.
If not, ie. your calls are diverted to your voice box (answering service) then cancel the divert.
Get the manual here:
SMS are not always delivered immediately that is down to the 'works overload'

Posted on Jan 14, 2008


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Posted on Jan 02, 2017


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