Yeah.i had the same when i lost cellular network.
i used to loose cellular network for 1 day then it comes back
it's supposed to drain fast because of low signal strength.because the handset keeps looking for network.
Look ! Toggle airplane mode on and off repeatedly.
then Remove sim card and reinsert it again
if this deosn't work.
then do the first method i told you about in the first comment.if this didn't work for you,
then,the last solution i'd suggest
is to do a hard reset through recovery.
because the first time i lost signal
hard reset solved the problem
but in the second time,i simply wiped the cashe and set network mode as 2G then turned off my phone waited for 10 sec then turned it on then typed *#*#4636#*#* and set cellular network type as GSm then went to settings/network mode and set it as 3G.
and and then set network operator as choose automatically. and had my cellular network back.
Posted via the Android Central App
05-02-2016 06:08 AM