* Are these sentences correct?
1. Do I have to hold the mobile/cellphone all the time just to wait for your (text) messages to arrive?
* We call it a cellphone in the United States.
1b. Do I have to hold the cellphone (the entire time) while waiting for your (text) messages to arrive?
2. Do I have to keep looking at the screen just to wait for your (text) messages to arrive?